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- /* ====================================================================
- * Copyright (c) 1995-1999 The Apache Group. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the Apache Group
- * for use in the Apache HTTP server project (http://www.apache.org/)."
- *
- * 4. The names "Apache Server" and "Apache Group" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission. For written permission, please contact
- * apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache"
- * nor may "Apache" appear in their names without prior written
- * permission of the Apache Group.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the Apache Group
- * for use in the Apache HTTP server project (http://www.apache.org/)."
- *
- * THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE APACHE GROUP OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Group and was originally based
- * on public domain software written at the National Center for
- * Supercomputing Applications, University of Illinois, Urbana-Champaign.
- * For more information on the Apache Group and the Apache HTTP server
- * project, please see <http://www.apache.org/>.
- *
- */
-
- /*
- * Resource allocation code... the code here is responsible for making
- * sure that nothing leaks.
- *
- * rst --- 4/95 --- 6/95
- */
-
- #include "httpd.h"
- #include "multithread.h"
- #include "http_log.h"
-
- #include <stdarg.h>
-
- /* debugging support, define this to enable code which helps detect re-use
- * of freed memory and other such nonsense.
- *
- * The theory is simple. The FILL_BYTE (0xa5) is written over all malloc'd
- * memory as we receive it, and is written over everything that we free up
- * during a clear_pool. We check that blocks on the free list always
- * have the FILL_BYTE in them, and we check during palloc() that the bytes
- * still have FILL_BYTE in them. If you ever see garbage URLs or whatnot
- * containing lots of 0xa5s then you know something used data that's been
- * freed or uninitialized.
- */
- /* #define ALLOC_DEBUG */
-
- /* debugging support, if defined all allocations will be done with
- * malloc and free()d appropriately at the end. This is intended to be
- * used with something like Electric Fence or Purify to help detect
- * memory problems. Note that if you're using efence then you should also
- * add in ALLOC_DEBUG. But don't add in ALLOC_DEBUG if you're using Purify
- * because ALLOC_DEBUG would hide all the uninitialized read errors that
- * Purify can diagnose.
- */
- /* #define ALLOC_USE_MALLOC */
-
- /* Pool debugging support. This is intended to detect cases where the
- * wrong pool is used when assigning data to an object in another pool.
- * In particular, it causes the table_{set,add,merge}n routines to check
- * that their arguments are safe for the table they're being placed in.
- * It currently only works with the unix multiprocess model, but could
- * be extended to others.
- */
- /* #define POOL_DEBUG */
-
- /* Provide diagnostic information about make_table() calls which are
- * possibly too small. This requires a recent gcc which supports
- * __builtin_return_address(). The error_log output will be a
- * message such as:
- * table_push: table created by 0x804d874 hit limit of 10
- * Use "l *0x804d874" to find the source that corresponds to. It
- * indicates that a table allocated by a call at that address has
- * possibly too small an initial table size guess.
- */
- /* #define MAKE_TABLE_PROFILE */
-
- #ifdef POOL_DEBUG
- #ifdef ALLOC_USE_MALLOC
- # error "sorry, no support for ALLOC_USE_MALLOC and POOL_DEBUG at the same time"
- #endif
- #ifdef MULTITHREAD
- # error "sorry, no support for MULTITHREAD and POOL_DEBUG at the same time"
- #endif
- #endif
-
- #ifdef ALLOC_USE_MALLOC
- #undef BLOCK_MINFREE
- #undef BLOCK_MINALLOC
- #define BLOCK_MINFREE 0
- #define BLOCK_MINALLOC 0
- #endif
-
- /*****************************************************************
- *
- * Managing free storage blocks...
- */
-
- union align {
- /* Types which are likely to have the longest RELEVANT alignment
- * restrictions...
- */
-
- char *cp;
- void (*f) (void);
- long l;
- FILE *fp;
- double d;
- };
-
- #define CLICK_SZ (sizeof(union align))
-
- union block_hdr {
- union align a;
-
- /* Actual header... */
-
- struct {
- char *endp;
- union block_hdr *next;
- char *first_avail;
- #ifdef POOL_DEBUG
- union block_hdr *global_next;
- struct pool *owning_pool;
- #endif
- } h;
- };
-
- static union block_hdr *block_freelist = NULL;
- static mutex *alloc_mutex = NULL;
- static mutex *spawn_mutex = NULL;
- #ifdef POOL_DEBUG
- static char *known_stack_point;
- static int stack_direction;
- static union block_hdr *global_block_list;
- #define FREE_POOL ((struct pool *)(-1))
- #endif
-
- #ifdef ALLOC_DEBUG
- #define FILL_BYTE ((char)(0xa5))
-
- #define debug_fill(ptr,size) ((void)memset((ptr), FILL_BYTE, (size)))
-
- static ap_inline void debug_verify_filled(const char *ptr,
- const char *endp, const char *error_msg)
- {
- for (; ptr < endp; ++ptr) {
- if (*ptr != FILL_BYTE) {
- fputs(error_msg, stderr);
- abort();
- exit(1);
- }
- }
- }
-
- #else
- #define debug_fill(a,b)
- #define debug_verify_filled(a,b,c)
- #endif
-
-
- /* Get a completely new block from the system pool. Note that we rely on
- malloc() to provide aligned memory. */
-
- static union block_hdr *malloc_block(int size)
- {
- union block_hdr *blok;
-
- #ifdef ALLOC_DEBUG
- /* make some room at the end which we'll fill and expect to be
- * always filled
- */
- size += CLICK_SZ;
- #endif
- blok = (union block_hdr *) malloc(size + sizeof(union block_hdr));
- if (blok == NULL) {
- fprintf(stderr, "Ouch! malloc failed in malloc_block()\n");
- exit(1);
- }
- debug_fill(blok, size + sizeof(union block_hdr));
- blok->h.next = NULL;
- blok->h.first_avail = (char *) (blok + 1);
- blok->h.endp = size + blok->h.first_avail;
- #ifdef ALLOC_DEBUG
- blok->h.endp -= CLICK_SZ;
- #endif
- #ifdef POOL_DEBUG
- blok->h.global_next = global_block_list;
- global_block_list = blok;
- blok->h.owning_pool = NULL;
- #endif
-
- return blok;
- }
-
-
-
- #if defined(ALLOC_DEBUG) && !defined(ALLOC_USE_MALLOC)
- static void chk_on_blk_list(union block_hdr *blok, union block_hdr *free_blk)
- {
- debug_verify_filled(blok->h.endp, blok->h.endp + CLICK_SZ,
- "Ouch! Someone trounced the padding at the end of a block!\n");
- while (free_blk) {
- if (free_blk == blok) {
- fprintf(stderr, "Ouch! Freeing free block\n");
- abort();
- exit(1);
- }
- free_blk = free_blk->h.next;
- }
- }
- #else
- #define chk_on_blk_list(_x, _y)
- #endif
-
- /* Free a chain of blocks --- must be called with alarms blocked. */
-
- static void free_blocks(union block_hdr *blok)
- {
- #ifdef ALLOC_USE_MALLOC
- union block_hdr *next;
-
- for (; blok; blok = next) {
- next = blok->h.next;
- free(blok);
- }
- #else
- /* First, put new blocks at the head of the free list ---
- * we'll eventually bash the 'next' pointer of the last block
- * in the chain to point to the free blocks we already had.
- */
-
- union block_hdr *old_free_list;
-
- if (blok == NULL)
- return; /* Sanity check --- freeing empty pool? */
-
- (void) ap_acquire_mutex(alloc_mutex);
- old_free_list = block_freelist;
- block_freelist = blok;
-
- /*
- * Next, adjust first_avail pointers of each block --- have to do it
- * sooner or later, and it simplifies the search in new_block to do it
- * now.
- */
-
- while (blok->h.next != NULL) {
- chk_on_blk_list(blok, old_free_list);
- blok->h.first_avail = (char *) (blok + 1);
- debug_fill(blok->h.first_avail, blok->h.endp - blok->h.first_avail);
- #ifdef POOL_DEBUG
- blok->h.owning_pool = FREE_POOL;
- #endif
- blok = blok->h.next;
- }
-
- chk_on_blk_list(blok, old_free_list);
- blok->h.first_avail = (char *) (blok + 1);
- debug_fill(blok->h.first_avail, blok->h.endp - blok->h.first_avail);
- #ifdef POOL_DEBUG
- blok->h.owning_pool = FREE_POOL;
- #endif
-
- /* Finally, reset next pointer to get the old free blocks back */
-
- blok->h.next = old_free_list;
- (void) ap_release_mutex(alloc_mutex);
- #endif
- }
-
-
- /* Get a new block, from our own free list if possible, from the system
- * if necessary. Must be called with alarms blocked.
- */
-
- static union block_hdr *new_block(int min_size)
- {
- union block_hdr **lastptr = &block_freelist;
- union block_hdr *blok = block_freelist;
-
- /* First, see if we have anything of the required size
- * on the free list...
- */
-
- while (blok != NULL) {
- if (min_size + BLOCK_MINFREE <= blok->h.endp - blok->h.first_avail) {
- *lastptr = blok->h.next;
- blok->h.next = NULL;
- debug_verify_filled(blok->h.first_avail, blok->h.endp,
- "Ouch! Someone trounced a block on the free list!\n");
- return blok;
- }
- else {
- lastptr = &blok->h.next;
- blok = blok->h.next;
- }
- }
-
- /* Nope. */
-
- min_size += BLOCK_MINFREE;
- blok = malloc_block((min_size > BLOCK_MINALLOC) ? min_size : BLOCK_MINALLOC);
- return blok;
- }
-
-
- /* Accounting */
-
- static long bytes_in_block_list(union block_hdr *blok)
- {
- long size = 0;
-
- while (blok) {
- size += blok->h.endp - (char *) (blok + 1);
- blok = blok->h.next;
- }
-
- return size;
- }
-
-
- /*****************************************************************
- *
- * Pool internals and management...
- * NB that subprocesses are not handled by the generic cleanup code,
- * basically because we don't want cleanups for multiple subprocesses
- * to result in multiple three-second pauses.
- */
-
- struct process_chain;
- struct cleanup;
-
- static void run_cleanups(struct cleanup *);
- static void free_proc_chain(struct process_chain *);
-
- struct pool {
- union block_hdr *first;
- union block_hdr *last;
- struct cleanup *cleanups;
- struct process_chain *subprocesses;
- struct pool *sub_pools;
- struct pool *sub_next;
- struct pool *sub_prev;
- struct pool *parent;
- char *free_first_avail;
- #ifdef ALLOC_USE_MALLOC
- void *allocation_list;
- #endif
- #ifdef POOL_DEBUG
- struct pool *joined;
- #endif
- };
-
- static pool *permanent_pool;
-
- /* Each pool structure is allocated in the start of its own first block,
- * so we need to know how many bytes that is (once properly aligned...).
- * This also means that when a pool's sub-pool is destroyed, the storage
- * associated with it is *completely* gone, so we have to make sure it
- * gets taken off the parent's sub-pool list...
- */
-
- #define POOL_HDR_CLICKS (1 + ((sizeof(struct pool) - 1) / CLICK_SZ))
- #define POOL_HDR_BYTES (POOL_HDR_CLICKS * CLICK_SZ)
-
- API_EXPORT(struct pool *) ap_make_sub_pool(struct pool *p)
- {
- union block_hdr *blok;
- pool *new_pool;
-
- ap_block_alarms();
-
- (void) ap_acquire_mutex(alloc_mutex);
-
- blok = new_block(POOL_HDR_BYTES);
- new_pool = (pool *) blok->h.first_avail;
- blok->h.first_avail += POOL_HDR_BYTES;
- #ifdef POOL_DEBUG
- blok->h.owning_pool = new_pool;
- #endif
-
- memset((char *) new_pool, '\0', sizeof(struct pool));
- new_pool->free_first_avail = blok->h.first_avail;
- new_pool->first = new_pool->last = blok;
-
- if (p) {
- new_pool->parent = p;
- new_pool->sub_next = p->sub_pools;
- if (new_pool->sub_next)
- new_pool->sub_next->sub_prev = new_pool;
- p->sub_pools = new_pool;
- }
-
- (void) ap_release_mutex(alloc_mutex);
- ap_unblock_alarms();
-
- return new_pool;
- }
-
- #ifdef POOL_DEBUG
- static void stack_var_init(char *s)
- {
- char t;
-
- if (s < &t) {
- stack_direction = 1; /* stack grows up */
- }
- else {
- stack_direction = -1; /* stack grows down */
- }
- }
- #endif
-
- pool *ap_init_alloc(void)
- {
- #ifdef POOL_DEBUG
- char s;
-
- known_stack_point = &s;
- stack_var_init(&s);
- #endif
- alloc_mutex = ap_create_mutex(NULL);
- spawn_mutex = ap_create_mutex(NULL);
- permanent_pool = ap_make_sub_pool(NULL);
-
- return permanent_pool;
- }
-
- API_EXPORT(void) ap_clear_pool(struct pool *a)
- {
- ap_block_alarms();
-
- (void) ap_acquire_mutex(alloc_mutex);
- while (a->sub_pools)
- ap_destroy_pool(a->sub_pools);
- (void) ap_release_mutex(alloc_mutex);
- /* Don't hold the mutex during cleanups. */
- run_cleanups(a->cleanups);
- a->cleanups = NULL;
- free_proc_chain(a->subprocesses);
- a->subprocesses = NULL;
- free_blocks(a->first->h.next);
- a->first->h.next = NULL;
-
- a->last = a->first;
- a->first->h.first_avail = a->free_first_avail;
- debug_fill(a->first->h.first_avail,
- a->first->h.endp - a->first->h.first_avail);
-
- #ifdef ALLOC_USE_MALLOC
- {
- void *c, *n;
-
- for (c = a->allocation_list; c; c = n) {
- n = *(void **)c;
- free(c);
- }
- a->allocation_list = NULL;
- }
- #endif
-
- ap_unblock_alarms();
- }
-
- API_EXPORT(void) ap_destroy_pool(pool *a)
- {
- ap_block_alarms();
- ap_clear_pool(a);
-
- (void) ap_acquire_mutex(alloc_mutex);
- if (a->parent) {
- if (a->parent->sub_pools == a)
- a->parent->sub_pools = a->sub_next;
- if (a->sub_prev)
- a->sub_prev->sub_next = a->sub_next;
- if (a->sub_next)
- a->sub_next->sub_prev = a->sub_prev;
- }
- (void) ap_release_mutex(alloc_mutex);
-
- free_blocks(a->first);
- ap_unblock_alarms();
- }
-
- API_EXPORT(long) ap_bytes_in_pool(pool *p)
- {
- return bytes_in_block_list(p->first);
- }
- API_EXPORT(long) ap_bytes_in_free_blocks(void)
- {
- return bytes_in_block_list(block_freelist);
- }
-
- /*****************************************************************
- * POOL_DEBUG support
- */
- #ifdef POOL_DEBUG
-
- /* the unix linker defines this symbol as the last byte + 1 of
- * the executable... so it includes TEXT, BSS, and DATA
- */
- extern char _end;
-
- /* is ptr in the range [lo,hi) */
- #define is_ptr_in_range(ptr, lo, hi) \
- (((unsigned long)(ptr) - (unsigned long)(lo)) \
- < \
- (unsigned long)(hi) - (unsigned long)(lo))
-
- /* Find the pool that ts belongs to, return NULL if it doesn't
- * belong to any pool.
- */
- API_EXPORT(pool *) ap_find_pool(const void *ts)
- {
- const char *s = ts;
- union block_hdr **pb;
- union block_hdr *b;
-
- /* short-circuit stuff which is in TEXT, BSS, or DATA */
- if (is_ptr_in_range(s, 0, &_end)) {
- return NULL;
- }
- /* consider stuff on the stack to also be in the NULL pool...
- * XXX: there's cases where we don't want to assume this
- */
- if ((stack_direction == -1 && is_ptr_in_range(s, &ts, known_stack_point))
- || (stack_direction == 1 && is_ptr_in_range(s, known_stack_point, &ts))) {
- abort();
- return NULL;
- }
- ap_block_alarms();
- /* search the global_block_list */
- for (pb = &global_block_list; *pb; pb = &b->h.global_next) {
- b = *pb;
- if (is_ptr_in_range(s, b, b->h.endp)) {
- if (b->h.owning_pool == FREE_POOL) {
- fprintf(stderr,
- "Ouch! find_pool() called on pointer in a free block\n");
- abort();
- exit(1);
- }
- if (b != global_block_list) {
- /* promote b to front of list, this is a hack to speed
- * up the lookup */
- *pb = b->h.global_next;
- b->h.global_next = global_block_list;
- global_block_list = b;
- }
- ap_unblock_alarms();
- return b->h.owning_pool;
- }
- }
- ap_unblock_alarms();
- return NULL;
- }
-
- /* return TRUE iff a is an ancestor of b
- * NULL is considered an ancestor of all pools
- */
- API_EXPORT(int) ap_pool_is_ancestor(pool *a, pool *b)
- {
- if (a == NULL) {
- return 1;
- }
- while (a->joined) {
- a = a->joined;
- }
- while (b) {
- if (a == b) {
- return 1;
- }
- b = b->parent;
- }
- return 0;
- }
-
- /* All blocks belonging to sub will be changed to point to p
- * instead. This is a guarantee by the caller that sub will not
- * be destroyed before p is.
- */
- API_EXPORT(void) ap_pool_join(pool *p, pool *sub)
- {
- union block_hdr *b;
-
- /* We could handle more general cases... but this is it for now. */
- if (sub->parent != p) {
- fprintf(stderr, "pool_join: p is not parent of sub\n");
- abort();
- }
- ap_block_alarms();
- while (p->joined) {
- p = p->joined;
- }
- sub->joined = p;
- for (b = global_block_list; b; b = b->h.global_next) {
- if (b->h.owning_pool == sub) {
- b->h.owning_pool = p;
- }
- }
- ap_unblock_alarms();
- }
- #endif
-
- /*****************************************************************
- *
- * Allocating stuff...
- */
-
-
- API_EXPORT(void *) ap_palloc(struct pool *a, int reqsize)
- {
- #ifdef ALLOC_USE_MALLOC
- int size = reqsize + CLICK_SZ;
- void *ptr;
-
- ap_block_alarms();
- ptr = malloc(size);
- if (ptr == NULL) {
- fputs("Ouch! Out of memory!\n", stderr);
- exit(1);
- }
- debug_fill(ptr, size); /* might as well get uninitialized protection */
- *(void **)ptr = a->allocation_list;
- a->allocation_list = ptr;
- ap_unblock_alarms();
- return (char *)ptr + CLICK_SZ;
- #else
-
- /* Round up requested size to an even number of alignment units (core clicks)
- */
-
- int nclicks = 1 + ((reqsize - 1) / CLICK_SZ);
- int size = nclicks * CLICK_SZ;
-
- /* First, see if we have space in the block most recently
- * allocated to this pool
- */
-
- union block_hdr *blok = a->last;
- char *first_avail = blok->h.first_avail;
- char *new_first_avail;
-
- if (reqsize <= 0)
- return NULL;
-
- new_first_avail = first_avail + size;
-
- if (new_first_avail <= blok->h.endp) {
- debug_verify_filled(first_avail, blok->h.endp,
- "Ouch! Someone trounced past the end of their allocation!\n");
- blok->h.first_avail = new_first_avail;
- return (void *) first_avail;
- }
-
- /* Nope --- get a new one that's guaranteed to be big enough */
-
- ap_block_alarms();
-
- (void) ap_acquire_mutex(alloc_mutex);
-
- blok = new_block(size);
- a->last->h.next = blok;
- a->last = blok;
- #ifdef POOL_DEBUG
- blok->h.owning_pool = a;
- #endif
-
- (void) ap_release_mutex(alloc_mutex);
-
- ap_unblock_alarms();
-
- first_avail = blok->h.first_avail;
- blok->h.first_avail += size;
-
- return (void *) first_avail;
- #endif
- }
-
- API_EXPORT(void *) ap_pcalloc(struct pool *a, int size)
- {
- void *res = ap_palloc(a, size);
- memset(res, '\0', size);
- return res;
- }
-
- API_EXPORT(char *) ap_pstrdup(struct pool *a, const char *s)
- {
- char *res;
- size_t len;
-
- if (s == NULL)
- return NULL;
- len = strlen(s) + 1;
- res = ap_palloc(a, len);
- memcpy(res, s, len);
- return res;
- }
-
- API_EXPORT(char *) ap_pstrndup(struct pool *a, const char *s, int n)
- {
- char *res;
-
- if (s == NULL)
- return NULL;
- res = ap_palloc(a, n + 1);
- memcpy(res, s, n);
- res[n] = '\0';
- return res;
- }
-
- API_EXPORT_NONSTD(char *) ap_pstrcat(pool *a,...)
- {
- char *cp, *argp, *res;
-
- /* Pass one --- find length of required string */
-
- int len = 0;
- va_list adummy;
-
- va_start(adummy, a);
-
- while ((cp = va_arg(adummy, char *)) != NULL)
- len += strlen(cp);
-
- va_end(adummy);
-
- /* Allocate the required string */
-
- res = (char *) ap_palloc(a, len + 1);
- cp = res;
- *cp = '\0';
-
- /* Pass two --- copy the argument strings into the result space */
-
- va_start(adummy, a);
-
- while ((argp = va_arg(adummy, char *)) != NULL) {
- strcpy(cp, argp);
- cp += strlen(argp);
- }
-
- va_end(adummy);
-
- /* Return the result string */
-
- return res;
- }
-
- /* ap_psprintf is implemented by writing directly into the current
- * block of the pool, starting right at first_avail. If there's
- * insufficient room, then a new block is allocated and the earlier
- * output is copied over. The new block isn't linked into the pool
- * until all the output is done.
- *
- * Note that this is completely safe because nothing else can
- * allocate in this pool while ap_psprintf is running. alarms are
- * blocked, and the only thing outside of alloc.c that's invoked
- * is ap_vformatter -- which was purposefully written to be
- * self-contained with no callouts.
- */
-
- struct psprintf_data {
- ap_vformatter_buff vbuff;
- #ifdef ALLOC_USE_MALLOC
- char *base;
- #else
- union block_hdr *blok;
- int got_a_new_block;
- #endif
- };
-
- static int psprintf_flush(ap_vformatter_buff *vbuff)
- {
- struct psprintf_data *ps = (struct psprintf_data *)vbuff;
- #ifdef ALLOC_USE_MALLOC
- int size;
- char *ptr;
-
- size = (char *)ps->vbuff.curpos - ps->base;
- ptr = realloc(ps->base, 2*size);
- if (ptr == NULL) {
- fputs("Ouch! Out of memory!\n", stderr);
- exit(1);
- }
- ps->base = ptr;
- ps->vbuff.curpos = ptr + size;
- ps->vbuff.endpos = ptr + 2*size - 1;
- return 0;
- #else
- union block_hdr *blok;
- union block_hdr *nblok;
- size_t cur_len;
- char *strp;
-
- blok = ps->blok;
- strp = ps->vbuff.curpos;
- cur_len = strp - blok->h.first_avail;
-
- /* must try another blok */
- (void) ap_acquire_mutex(alloc_mutex);
- nblok = new_block(2 * cur_len);
- (void) ap_release_mutex(alloc_mutex);
- memcpy(nblok->h.first_avail, blok->h.first_avail, cur_len);
- ps->vbuff.curpos = nblok->h.first_avail + cur_len;
- /* save a byte for the NUL terminator */
- ps->vbuff.endpos = nblok->h.endp - 1;
-
- /* did we allocate the current blok? if so free it up */
- if (ps->got_a_new_block) {
- debug_fill(blok->h.first_avail, blok->h.endp - blok->h.first_avail);
- (void) ap_acquire_mutex(alloc_mutex);
- blok->h.next = block_freelist;
- block_freelist = blok;
- (void) ap_release_mutex(alloc_mutex);
- }
- ps->blok = nblok;
- ps->got_a_new_block = 1;
- /* note that we've deliberately not linked the new block onto
- * the pool yet... because we may need to flush again later, and
- * we'd have to spend more effort trying to unlink the block.
- */
- return 0;
- #endif
- }
-
- API_EXPORT(char *) ap_pvsprintf(pool *p, const char *fmt, va_list ap)
- {
- #ifdef ALLOC_USE_MALLOC
- struct psprintf_data ps;
- void *ptr;
-
- ap_block_alarms();
- ps.base = malloc(512);
- if (ps.base == NULL) {
- fputs("Ouch! Out of memory!\n", stderr);
- exit(1);
- }
- /* need room at beginning for allocation_list */
- ps.vbuff.curpos = ps.base + CLICK_SZ;
- ps.vbuff.endpos = ps.base + 511;
- ap_vformatter(psprintf_flush, &ps.vbuff, fmt, ap);
- *ps.vbuff.curpos++ = '\0';
- ptr = ps.base;
- /* shrink */
- ptr = realloc(ptr, (char *)ps.vbuff.curpos - (char *)ptr);
- if (ptr == NULL) {
- fputs("Ouch! Out of memory!\n", stderr);
- exit(1);
- }
- *(void **)ptr = p->allocation_list;
- p->allocation_list = ptr;
- ap_unblock_alarms();
- return (char *)ptr + CLICK_SZ;
- #else
- struct psprintf_data ps;
- char *strp;
- int size;
-
- ap_block_alarms();
- ps.blok = p->last;
- ps.vbuff.curpos = ps.blok->h.first_avail;
- ps.vbuff.endpos = ps.blok->h.endp - 1; /* save one for NUL */
- ps.got_a_new_block = 0;
-
- ap_vformatter(psprintf_flush, &ps.vbuff, fmt, ap);
-
- strp = ps.vbuff.curpos;
- *strp++ = '\0';
-
- size = strp - ps.blok->h.first_avail;
- size = (1 + ((size - 1) / CLICK_SZ)) * CLICK_SZ;
- strp = ps.blok->h.first_avail; /* save away result pointer */
- ps.blok->h.first_avail += size;
-
- /* have to link the block in if it's a new one */
- if (ps.got_a_new_block) {
- p->last->h.next = ps.blok;
- p->last = ps.blok;
- #ifdef POOL_DEBUG
- ps.blok->h.owning_pool = p;
- #endif
- }
- ap_unblock_alarms();
-
- return strp;
- #endif
- }
-
- API_EXPORT_NONSTD(char *) ap_psprintf(pool *p, const char *fmt, ...)
- {
- va_list ap;
- char *res;
-
- va_start(ap, fmt);
- res = ap_pvsprintf(p, fmt, ap);
- va_end(ap);
- return res;
- }
-
- /*****************************************************************
- *
- * The 'array' functions...
- */
-
- static void make_array_core(array_header *res, pool *p, int nelts, int elt_size)
- {
- if (nelts < 1)
- nelts = 1; /* Assure sanity if someone asks for
- * array of zero elts.
- */
-
- res->elts = ap_pcalloc(p, nelts * elt_size);
-
- res->pool = p;
- res->elt_size = elt_size;
- res->nelts = 0; /* No active elements yet... */
- res->nalloc = nelts; /* ...but this many allocated */
- }
-
- API_EXPORT(array_header *) ap_make_array(pool *p, int nelts, int elt_size)
- {
- array_header *res = (array_header *) ap_palloc(p, sizeof(array_header));
-
- make_array_core(res, p, nelts, elt_size);
- return res;
- }
-
- API_EXPORT(void *) ap_push_array(array_header *arr)
- {
- if (arr->nelts == arr->nalloc) {
- int new_size = (arr->nalloc <= 0) ? 1 : arr->nalloc * 2;
- char *new_data;
-
- new_data = ap_pcalloc(arr->pool, arr->elt_size * new_size);
-
- memcpy(new_data, arr->elts, arr->nalloc * arr->elt_size);
- arr->elts = new_data;
- arr->nalloc = new_size;
- }
-
- ++arr->nelts;
- return arr->elts + (arr->elt_size * (arr->nelts - 1));
- }
-
- API_EXPORT(void) ap_array_cat(array_header *dst, const array_header *src)
- {
- int elt_size = dst->elt_size;
-
- if (dst->nelts + src->nelts > dst->nalloc) {
- int new_size = (dst->nalloc <= 0) ? 1 : dst->nalloc * 2;
- char *new_data;
-
- while (dst->nelts + src->nelts > new_size)
- new_size *= 2;
-
- new_data = ap_pcalloc(dst->pool, elt_size * new_size);
- memcpy(new_data, dst->elts, dst->nalloc * elt_size);
-
- dst->elts = new_data;
- dst->nalloc = new_size;
- }
-
- memcpy(dst->elts + dst->nelts * elt_size, src->elts, elt_size * src->nelts);
- dst->nelts += src->nelts;
- }
-
- API_EXPORT(array_header *) ap_copy_array(pool *p, const array_header *arr)
- {
- array_header *res = ap_make_array(p, arr->nalloc, arr->elt_size);
-
- memcpy(res->elts, arr->elts, arr->elt_size * arr->nelts);
- res->nelts = arr->nelts;
- return res;
- }
-
- /* This cute function copies the array header *only*, but arranges
- * for the data section to be copied on the first push or arraycat.
- * It's useful when the elements of the array being copied are
- * read only, but new stuff *might* get added on the end; we have the
- * overhead of the full copy only where it is really needed.
- */
-
- static ap_inline void copy_array_hdr_core(array_header *res,
- const array_header *arr)
- {
- res->elts = arr->elts;
- res->elt_size = arr->elt_size;
- res->nelts = arr->nelts;
- res->nalloc = arr->nelts; /* Force overflow on push */
- }
-
- API_EXPORT(array_header *) ap_copy_array_hdr(pool *p, const array_header *arr)
- {
- array_header *res = (array_header *) ap_palloc(p, sizeof(array_header));
-
- res->pool = p;
- copy_array_hdr_core(res, arr);
- return res;
- }
-
- /* The above is used here to avoid consing multiple new array bodies... */
-
- API_EXPORT(array_header *) ap_append_arrays(pool *p,
- const array_header *first,
- const array_header *second)
- {
- array_header *res = ap_copy_array_hdr(p, first);
-
- ap_array_cat(res, second);
- return res;
- }
-
- /* ap_array_pstrcat generates a new string from the pool containing
- * the concatenated sequence of substrings referenced as elements within
- * the array. The string will be empty if all substrings are empty or null,
- * or if there are no elements in the array.
- * If sep is non-NUL, it will be inserted between elements as a separator.
- */
- API_EXPORT(char *) ap_array_pstrcat(pool *p, const array_header *arr,
- const char sep)
- {
- char *cp, *res, **strpp;
- int i, len;
-
- if (arr->nelts <= 0 || arr->elts == NULL) /* Empty table? */
- return (char *) ap_pcalloc(p, 1);
-
- /* Pass one --- find length of required string */
-
- len = 0;
- for (i = 0, strpp = (char **) arr->elts; ; ++strpp) {
- if (strpp && *strpp != NULL) {
- len += strlen(*strpp);
- }
- if (++i >= arr->nelts)
- break;
- if (sep)
- ++len;
- }
-
- /* Allocate the required string */
-
- res = (char *) ap_palloc(p, len + 1);
- cp = res;
-
- /* Pass two --- copy the argument strings into the result space */
-
- for (i = 0, strpp = (char **) arr->elts; ; ++strpp) {
- if (strpp && *strpp != NULL) {
- len = strlen(*strpp);
- memcpy(cp, *strpp, len);
- cp += len;
- }
- if (++i >= arr->nelts)
- break;
- if (sep)
- *cp++ = sep;
- }
-
- *cp = '\0';
-
- /* Return the result string */
-
- return res;
- }
-
-
- /*****************************************************************
- *
- * The "table" functions.
- */
-
- /* XXX: if you tweak this you should look at is_empty_table() and table_elts()
- * in alloc.h */
- struct table {
- /* This has to be first to promote backwards compatibility with
- * older modules which cast a table * to an array_header *...
- * they should use the table_elts() function for most of the
- * cases they do this for.
- */
- array_header a;
- #ifdef MAKE_TABLE_PROFILE
- void *creator;
- #endif
- };
-
- #ifdef MAKE_TABLE_PROFILE
- static table_entry *table_push(table *t)
- {
- if (t->a.nelts == t->a.nalloc) {
- fprintf(stderr,
- "table_push: table created by %p hit limit of %u\n",
- t->creator, t->a.nalloc);
- }
- return (table_entry *) ap_push_array(&t->a);
- }
- #else
- #define table_push(t) ((table_entry *) ap_push_array(&(t)->a))
- #endif
-
-
- API_EXPORT(table *) ap_make_table(pool *p, int nelts)
- {
- table *t = ap_palloc(p, sizeof(table));
-
- make_array_core(&t->a, p, nelts, sizeof(table_entry));
- #ifdef MAKE_TABLE_PROFILE
- t->creator = __builtin_return_address(0);
- #endif
- return t;
- }
-
- API_EXPORT(table *) ap_copy_table(pool *p, const table *t)
- {
- table *new = ap_palloc(p, sizeof(table));
-
- #ifdef POOL_DEBUG
- /* we don't copy keys and values, so it's necessary that t->a.pool
- * have a life span at least as long as p
- */
- if (!ap_pool_is_ancestor(t->a.pool, p)) {
- fprintf(stderr, "copy_table: t's pool is not an ancestor of p\n");
- abort();
- }
- #endif
- make_array_core(&new->a, p, t->a.nalloc, sizeof(table_entry));
- memcpy(new->a.elts, t->a.elts, t->a.nelts * sizeof(table_entry));
- new->a.nelts = t->a.nelts;
- return new;
- }
-
- API_EXPORT(void) ap_clear_table(table *t)
- {
- t->a.nelts = 0;
- }
-
- API_EXPORT(const char *) ap_table_get(const table *t, const char *key)
- {
- table_entry *elts = (table_entry *) t->a.elts;
- int i;
-
- if (key == NULL)
- return NULL;
-
- for (i = 0; i < t->a.nelts; ++i)
- if (!strcasecmp(elts[i].key, key))
- return elts[i].val;
-
- return NULL;
- }
-
- API_EXPORT(void) ap_table_set(table *t, const char *key, const char *val)
- {
- register int i, j, k;
- table_entry *elts = (table_entry *) t->a.elts;
- int done = 0;
-
- for (i = 0; i < t->a.nelts; ) {
- if (!strcasecmp(elts[i].key, key)) {
- if (!done) {
- elts[i].val = ap_pstrdup(t->a.pool, val);
- done = 1;
- ++i;
- }
- else { /* delete an extraneous element */
- for (j = i, k = i + 1; k < t->a.nelts; ++j, ++k) {
- elts[j].key = elts[k].key;
- elts[j].val = elts[k].val;
- }
- --t->a.nelts;
- }
- }
- else {
- ++i;
- }
- }
-
- if (!done) {
- elts = (table_entry *) table_push(t);
- elts->key = ap_pstrdup(t->a.pool, key);
- elts->val = ap_pstrdup(t->a.pool, val);
- }
- }
-
- API_EXPORT(void) ap_table_setn(table *t, const char *key, const char *val)
- {
- register int i, j, k;
- table_entry *elts = (table_entry *) t->a.elts;
- int done = 0;
-
- #ifdef POOL_DEBUG
- {
- if (!ap_pool_is_ancestor(ap_find_pool(key), t->a.pool)) {
- fprintf(stderr, "table_set: key not in ancestor pool of t\n");
- abort();
- }
- if (!ap_pool_is_ancestor(ap_find_pool(val), t->a.pool)) {
- fprintf(stderr, "table_set: val not in ancestor pool of t\n");
- abort();
- }
- }
- #endif
-
- for (i = 0; i < t->a.nelts; ) {
- if (!strcasecmp(elts[i].key, key)) {
- if (!done) {
- elts[i].val = (char *)val;
- done = 1;
- ++i;
- }
- else { /* delete an extraneous element */
- for (j = i, k = i + 1; k < t->a.nelts; ++j, ++k) {
- elts[j].key = elts[k].key;
- elts[j].val = elts[k].val;
- }
- --t->a.nelts;
- }
- }
- else {
- ++i;
- }
- }
-
- if (!done) {
- elts = (table_entry *) table_push(t);
- elts->key = (char *)key;
- elts->val = (char *)val;
- }
- }
-
- API_EXPORT(void) ap_table_unset(table *t, const char *key)
- {
- register int i, j, k;
- table_entry *elts = (table_entry *) t->a.elts;
-
- for (i = 0; i < t->a.nelts;) {
- if (!strcasecmp(elts[i].key, key)) {
-
- /* found an element to skip over
- * there are any number of ways to remove an element from
- * a contiguous block of memory. I've chosen one that
- * doesn't do a memcpy/bcopy/array_delete, *shrug*...
- */
- for (j = i, k = i + 1; k < t->a.nelts; ++j, ++k) {
- elts[j].key = elts[k].key;
- elts[j].val = elts[k].val;
- }
- --t->a.nelts;
- }
- else {
- ++i;
- }
- }
- }
-
- API_EXPORT(void) ap_table_merge(table *t, const char *key, const char *val)
- {
- table_entry *elts = (table_entry *) t->a.elts;
- int i;
-
- for (i = 0; i < t->a.nelts; ++i)
- if (!strcasecmp(elts[i].key, key)) {
- elts[i].val = ap_pstrcat(t->a.pool, elts[i].val, ", ", val, NULL);
- return;
- }
-
- elts = (table_entry *) table_push(t);
- elts->key = ap_pstrdup(t->a.pool, key);
- elts->val = ap_pstrdup(t->a.pool, val);
- }
-
- API_EXPORT(void) ap_table_mergen(table *t, const char *key, const char *val)
- {
- table_entry *elts = (table_entry *) t->a.elts;
- int i;
-
- #ifdef POOL_DEBUG
- {
- if (!ap_pool_is_ancestor(ap_find_pool(key), t->a.pool)) {
- fprintf(stderr, "table_set: key not in ancestor pool of t\n");
- abort();
- }
- if (!ap_pool_is_ancestor(ap_find_pool(val), t->a.pool)) {
- fprintf(stderr, "table_set: key not in ancestor pool of t\n");
- abort();
- }
- }
- #endif
-
- for (i = 0; i < t->a.nelts; ++i) {
- if (!strcasecmp(elts[i].key, key)) {
- elts[i].val = ap_pstrcat(t->a.pool, elts[i].val, ", ", val, NULL);
- return;
- }
- }
-
- elts = (table_entry *) table_push(t);
- elts->key = (char *)key;
- elts->val = (char *)val;
- }
-
- API_EXPORT(void) ap_table_add(table *t, const char *key, const char *val)
- {
- table_entry *elts = (table_entry *) t->a.elts;
-
- elts = (table_entry *) table_push(t);
- elts->key = ap_pstrdup(t->a.pool, key);
- elts->val = ap_pstrdup(t->a.pool, val);
- }
-
- API_EXPORT(void) ap_table_addn(table *t, const char *key, const char *val)
- {
- table_entry *elts = (table_entry *) t->a.elts;
-
- #ifdef POOL_DEBUG
- {
- if (!ap_pool_is_ancestor(ap_find_pool(key), t->a.pool)) {
- fprintf(stderr, "table_set: key not in ancestor pool of t\n");
- abort();
- }
- if (!ap_pool_is_ancestor(ap_find_pool(val), t->a.pool)) {
- fprintf(stderr, "table_set: key not in ancestor pool of t\n");
- abort();
- }
- }
- #endif
-
- elts = (table_entry *) table_push(t);
- elts->key = (char *)key;
- elts->val = (char *)val;
- }
-
- API_EXPORT(table *) ap_overlay_tables(pool *p, const table *overlay, const table *base)
- {
- table *res;
-
- #ifdef POOL_DEBUG
- /* we don't copy keys and values, so it's necessary that
- * overlay->a.pool and base->a.pool have a life span at least
- * as long as p
- */
- if (!ap_pool_is_ancestor(overlay->a.pool, p)) {
- fprintf(stderr, "overlay_tables: overlay's pool is not an ancestor of p\n");
- abort();
- }
- if (!ap_pool_is_ancestor(base->a.pool, p)) {
- fprintf(stderr, "overlay_tables: base's pool is not an ancestor of p\n");
- abort();
- }
- #endif
-
- res = ap_palloc(p, sizeof(table));
- /* behave like append_arrays */
- res->a.pool = p;
- copy_array_hdr_core(&res->a, &overlay->a);
- ap_array_cat(&res->a, &base->a);
-
- return res;
- }
-
- /* And now for something completely abstract ...
-
- * For each key value given as a vararg:
- * run the function pointed to as
- * int comp(void *r, char *key, char *value);
- * on each valid key-value pair in the table t that matches the vararg key,
- * or once for every valid key-value pair if the vararg list is empty,
- * until the function returns false (0) or we finish the table.
- *
- * Note that we restart the traversal for each vararg, which means that
- * duplicate varargs will result in multiple executions of the function
- * for each matching key. Note also that if the vararg list is empty,
- * only one traversal will be made and will cut short if comp returns 0.
- *
- * Note that the table_get and table_merge functions assume that each key in
- * the table is unique (i.e., no multiple entries with the same key). This
- * function does not make that assumption, since it (unfortunately) isn't
- * true for some of Apache's tables.
- *
- * Note that rec is simply passed-on to the comp function, so that the
- * caller can pass additional info for the task.
- */
- API_EXPORT(void) ap_table_do(int (*comp) (void *, const char *, const char *), void *rec,
- const table *t,...)
- {
- va_list vp;
- char *argp;
- table_entry *elts = (table_entry *) t->a.elts;
- int rv, i;
-
- va_start(vp, t);
-
- argp = va_arg(vp, char *);
-
- do {
- for (rv = 1, i = 0; rv && (i < t->a.nelts); ++i) {
- if (elts[i].key && (!argp || !strcasecmp(elts[i].key, argp))) {
- rv = (*comp) (rec, elts[i].key, elts[i].val);
- }
- }
- } while (argp && ((argp = va_arg(vp, char *)) != NULL));
-
- va_end(vp);
- }
-
- /* Curse libc and the fact that it doesn't guarantee a stable sort. We
- * have to enforce stability ourselves by using the order field. If it
- * provided a stable sort then we wouldn't even need temporary storage to
- * do the work below. -djg
- *
- * ("stable sort" means that equal keys retain their original relative
- * ordering in the output.)
- */
- typedef struct {
- char *key;
- char *val;
- int order;
- } overlap_key;
-
- static int sort_overlap(const void *va, const void *vb)
- {
- const overlap_key *a = va;
- const overlap_key *b = vb;
- int r;
-
- r = strcasecmp(a->key, b->key);
- if (r) {
- return r;
- }
- return a->order - b->order;
- }
-
- /* prefer to use the stack for temp storage for overlaps smaller than this */
- #ifndef AP_OVERLAP_TABLES_ON_STACK
- #define AP_OVERLAP_TABLES_ON_STACK (512)
- #endif
-
- API_EXPORT(void) ap_overlap_tables(table *a, const table *b, unsigned flags)
- {
- overlap_key cat_keys_buf[AP_OVERLAP_TABLES_ON_STACK];
- overlap_key *cat_keys;
- int nkeys;
- table_entry *e;
- table_entry *last_e;
- overlap_key *left;
- overlap_key *right;
- overlap_key *last;
-
- nkeys = a->a.nelts + b->a.nelts;
- if (nkeys < AP_OVERLAP_TABLES_ON_STACK) {
- cat_keys = cat_keys_buf;
- }
- else {
- /* XXX: could use scratch free space in a or b's pool instead...
- * which could save an allocation in b's pool.
- */
- cat_keys = ap_palloc(b->a.pool, sizeof(overlap_key) * nkeys);
- }
-
- nkeys = 0;
-
- /* Create a list of the entries from a concatenated with the entries
- * from b.
- */
- e = (table_entry *)a->a.elts;
- last_e = e + a->a.nelts;
- while (e < last_e) {
- cat_keys[nkeys].key = e->key;
- cat_keys[nkeys].val = e->val;
- cat_keys[nkeys].order = nkeys;
- ++nkeys;
- ++e;
- }
-
- e = (table_entry *)b->a.elts;
- last_e = e + b->a.nelts;
- while (e < last_e) {
- cat_keys[nkeys].key = e->key;
- cat_keys[nkeys].val = e->val;
- cat_keys[nkeys].order = nkeys;
- ++nkeys;
- ++e;
- }
-
- qsort(cat_keys, nkeys, sizeof(overlap_key), sort_overlap);
-
- /* Now iterate over the sorted list and rebuild a.
- * Start by making sure it has enough space.
- */
- a->a.nelts = 0;
- if (a->a.nalloc < nkeys) {
- a->a.elts = ap_palloc(a->a.pool, a->a.elt_size * nkeys * 2);
- a->a.nalloc = nkeys * 2;
- }
-
- /*
- * In both the merge and set cases we retain the invariant:
- *
- * left->key, (left+1)->key, (left+2)->key, ..., (right-1)->key
- * are all equal keys. (i.e. strcasecmp returns 0)
- *
- * We essentially need to find the maximal
- * right for each key, then we can do a quick merge or set as
- * appropriate.
- */
-
- if (flags & AP_OVERLAP_TABLES_MERGE) {
- left = cat_keys;
- last = left + nkeys;
- while (left < last) {
- right = left + 1;
- if (right == last
- || strcasecmp(left->key, right->key)) {
- ap_table_addn(a, left->key, left->val);
- left = right;
- }
- else {
- char *strp;
- char *value;
- size_t len;
-
- /* Have to merge some headers. Let's re-use the order field,
- * since it's handy... we'll store the length of val there.
- */
- left->order = strlen(left->val);
- len = left->order;
- do {
- right->order = strlen(right->val);
- len += 2 + right->order;
- ++right;
- } while (right < last
- && !strcasecmp(left->key, right->key));
- /* right points one past the last header to merge */
- value = ap_palloc(a->a.pool, len + 1);
- strp = value;
- for (;;) {
- memcpy(strp, left->val, left->order);
- strp += left->order;
- ++left;
- if (left == right) break;
- *strp++ = ',';
- *strp++ = ' ';
- }
- *strp = 0;
- ap_table_addn(a, (left-1)->key, value);
- }
- }
- }
- else {
- left = cat_keys;
- last = left + nkeys;
- while (left < last) {
- right = left + 1;
- while (right < last && !strcasecmp(left->key, right->key)) {
- ++right;
- }
- ap_table_addn(a, (right-1)->key, (right-1)->val);
- left = right;
- }
- }
- }
-
- /*****************************************************************
- *
- * Managing generic cleanups.
- */
-
- struct cleanup {
- void *data;
- void (*plain_cleanup) (void *);
- void (*child_cleanup) (void *);
- struct cleanup *next;
- };
-
- API_EXPORT(void) ap_register_cleanup(pool *p, void *data, void (*plain_cleanup) (void *),
- void (*child_cleanup) (void *))
- {
- struct cleanup *c = (struct cleanup *) ap_palloc(p, sizeof(struct cleanup));
- c->data = data;
- c->plain_cleanup = plain_cleanup;
- c->child_cleanup = child_cleanup;
- c->next = p->cleanups;
- p->cleanups = c;
- }
-
- API_EXPORT(void) ap_kill_cleanup(pool *p, void *data, void (*cleanup) (void *))
- {
- struct cleanup *c = p->cleanups;
- struct cleanup **lastp = &p->cleanups;
-
- while (c) {
- if (c->data == data && c->plain_cleanup == cleanup) {
- *lastp = c->next;
- break;
- }
-
- lastp = &c->next;
- c = c->next;
- }
- }
-
- API_EXPORT(void) ap_run_cleanup(pool *p, void *data, void (*cleanup) (void *))
- {
- ap_block_alarms(); /* Run cleanup only once! */
- (*cleanup) (data);
- ap_kill_cleanup(p, data, cleanup);
- ap_unblock_alarms();
- }
-
- static void run_cleanups(struct cleanup *c)
- {
- while (c) {
- (*c->plain_cleanup) (c->data);
- c = c->next;
- }
- }
-
- static void run_child_cleanups(struct cleanup *c)
- {
- while (c) {
- (*c->child_cleanup) (c->data);
- c = c->next;
- }
- }
-
- static void cleanup_pool_for_exec(pool *p)
- {
- run_child_cleanups(p->cleanups);
- p->cleanups = NULL;
-
- for (p = p->sub_pools; p; p = p->sub_next)
- cleanup_pool_for_exec(p);
- }
-
- API_EXPORT(void) ap_cleanup_for_exec(void)
- {
- #ifndef WIN32
- /*
- * Don't need to do anything on NT, because I
- * am actually going to spawn the new process - not
- * exec it. All handles that are not inheritable, will
- * be automajically closed. The only problem is with
- * file handles that are open, but there isn't much
- * I can do about that (except if the child decides
- * to go out and close them
- */
- ap_block_alarms();
- cleanup_pool_for_exec(permanent_pool);
- ap_unblock_alarms();
- #endif /* ndef WIN32 */
- }
-
- API_EXPORT_NONSTD(void) ap_null_cleanup(void *data)
- {
- /* do nothing cleanup routine */
- }
-
- /*****************************************************************
- *
- * Files and file descriptors; these are just an application of the
- * generic cleanup interface.
- */
-
- static void fd_cleanup(void *fdv)
- {
- close((int) (long) fdv);
- }
-
- API_EXPORT(void) ap_note_cleanups_for_fd(pool *p, int fd)
- {
- ap_register_cleanup(p, (void *) (long) fd, fd_cleanup, fd_cleanup);
- }
-
- API_EXPORT(void) ap_kill_cleanups_for_fd(pool *p, int fd)
- {
- ap_kill_cleanup(p, (void *) (long) fd, fd_cleanup);
- }
-
- API_EXPORT(int) ap_popenf(pool *a, const char *name, int flg, int mode)
- {
- int fd;
- int save_errno;
-
- ap_block_alarms();
- fd = open(name, flg, mode);
- save_errno = errno;
- if (fd >= 0) {
- fd = ap_slack(fd, AP_SLACK_HIGH);
- ap_note_cleanups_for_fd(a, fd);
- }
- ap_unblock_alarms();
- errno = save_errno;
- return fd;
- }
-
- API_EXPORT(int) ap_pclosef(pool *a, int fd)
- {
- int res;
- int save_errno;
-
- ap_block_alarms();
- res = close(fd);
- save_errno = errno;
- ap_kill_cleanup(a, (void *) (long) fd, fd_cleanup);
- ap_unblock_alarms();
- errno = save_errno;
- return res;
- }
-
- #ifdef WIN32
- static void h_cleanup(void *fdv)
- {
- CloseHandle((HANDLE) fdv);
- }
-
- API_EXPORT(void) ap_note_cleanups_for_h(pool *p, HANDLE hDevice)
- {
- ap_register_cleanup(p, (void *) hDevice, h_cleanup, h_cleanup);
- }
-
- API_EXPORT(int) ap_pcloseh(pool *a, HANDLE hDevice)
- {
- int res=0;
- int save_errno;
-
- ap_block_alarms();
-
- if (!CloseHandle(hDevice)) {
- res = GetLastError();
- }
-
- save_errno = errno;
- ap_kill_cleanup(a, (void *) hDevice, h_cleanup);
- ap_unblock_alarms();
- errno = save_errno;
- return res;
- }
- #endif
-
- /* Note that we have separate plain_ and child_ cleanups for FILE *s,
- * since fclose() would flush I/O buffers, which is extremely undesirable;
- * we just close the descriptor.
- */
-
- static void file_cleanup(void *fpv)
- {
- fclose((FILE *) fpv);
- }
- static void file_child_cleanup(void *fpv)
- {
- close(fileno((FILE *) fpv));
- }
-
- API_EXPORT(void) ap_note_cleanups_for_file(pool *p, FILE *fp)
- {
- ap_register_cleanup(p, (void *) fp, file_cleanup, file_child_cleanup);
- }
-
- API_EXPORT(FILE *) ap_pfopen(pool *a, const char *name, const char *mode)
- {
- FILE *fd = NULL;
- int baseFlag, desc;
- int modeFlags = 0;
- int saved_errno;
-
- #ifdef WIN32
- modeFlags = _S_IREAD | _S_IWRITE;
- #else
- modeFlags = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH;
- #endif
-
- ap_block_alarms();
-
- if (*mode == 'a') {
- /* Work around faulty implementations of fopen */
- baseFlag = (*(mode + 1) == '+') ? O_RDWR : O_WRONLY;
- desc = open(name, baseFlag | O_APPEND | O_CREAT,
- modeFlags);
- if (desc >= 0) {
- desc = ap_slack(desc, AP_SLACK_LOW);
- fd = ap_fdopen(desc, mode);
- }
- }
- else {
- fd = fopen(name, mode);
- }
- saved_errno = errno;
- if (fd != NULL)
- ap_note_cleanups_for_file(a, fd);
- ap_unblock_alarms();
- errno = saved_errno;
- return fd;
- }
-
- API_EXPORT(FILE *) ap_pfdopen(pool *a, int fd, const char *mode)
- {
- FILE *f;
- int saved_errno;
-
- ap_block_alarms();
- f = ap_fdopen(fd, mode);
- saved_errno = errno;
- if (f != NULL)
- ap_note_cleanups_for_file(a, f);
- ap_unblock_alarms();
- errno = saved_errno;
- return f;
- }
-
-
- API_EXPORT(int) ap_pfclose(pool *a, FILE *fd)
- {
- int res;
-
- ap_block_alarms();
- res = fclose(fd);
- ap_kill_cleanup(a, (void *) fd, file_cleanup);
- ap_unblock_alarms();
- return res;
- }
-
- /*
- * DIR * with cleanup
- */
-
- static void dir_cleanup(void *dv)
- {
- closedir((DIR *) dv);
- }
-
- API_EXPORT(DIR *) ap_popendir(pool *p, const char *name)
- {
- DIR *d;
- int save_errno;
-
- ap_block_alarms();
- d = opendir(name);
- if (d == NULL) {
- save_errno = errno;
- ap_unblock_alarms();
- errno = save_errno;
- return NULL;
- }
- ap_register_cleanup(p, (void *) d, dir_cleanup, dir_cleanup);
- ap_unblock_alarms();
- return d;
- }
-
- API_EXPORT(void) ap_pclosedir(pool *p, DIR * d)
- {
- ap_block_alarms();
- ap_kill_cleanup(p, (void *) d, dir_cleanup);
- closedir(d);
- ap_unblock_alarms();
- }
-
- /*****************************************************************
- *
- * Files and file descriptors; these are just an application of the
- * generic cleanup interface.
- */
-
- static void socket_cleanup(void *fdv)
- {
- closesocket((int) (long) fdv);
- }
-
- API_EXPORT(void) ap_note_cleanups_for_socket(pool *p, int fd)
- {
- ap_register_cleanup(p, (void *) (long) fd, socket_cleanup, socket_cleanup);
- }
-
- API_EXPORT(void) ap_kill_cleanups_for_socket(pool *p, int sock)
- {
- ap_kill_cleanup(p, (void *) (long) sock, socket_cleanup);
- }
-
- API_EXPORT(int) ap_psocket(pool *p, int domain, int type, int protocol)
- {
- int fd;
-
- ap_block_alarms();
- fd = socket(domain, type, protocol);
- if (fd == -1) {
- int save_errno = errno;
- ap_unblock_alarms();
- errno = save_errno;
- return -1;
- }
- ap_note_cleanups_for_socket(p, fd);
- ap_unblock_alarms();
- return fd;
- }
-
- API_EXPORT(int) ap_pclosesocket(pool *a, int sock)
- {
- int res;
- int save_errno;
-
- ap_block_alarms();
- res = closesocket(sock);
- #ifdef WIN32
- errno = WSAGetLastError();
- #endif /* WIN32 */
- save_errno = errno;
- ap_kill_cleanup(a, (void *) (long) sock, socket_cleanup);
- ap_unblock_alarms();
- errno = save_errno;
- return res;
- }
-
-
- /*
- * Here's a pool-based interface to POSIX regex's regcomp().
- * Note that we return regex_t instead of being passed one.
- * The reason is that if you use an already-used regex_t structure,
- * the memory that you've already allocated gets forgotten, and
- * regfree() doesn't clear it. So we don't allow it.
- */
-
- static void regex_cleanup(void *preg)
- {
- regfree((regex_t *) preg);
- }
-
- API_EXPORT(regex_t *) ap_pregcomp(pool *p, const char *pattern, int cflags)
- {
- regex_t *preg = ap_palloc(p, sizeof(regex_t));
-
- if (regcomp(preg, pattern, cflags))
- return NULL;
-
- ap_register_cleanup(p, (void *) preg, regex_cleanup, regex_cleanup);
-
- return preg;
- }
-
-
- API_EXPORT(void) ap_pregfree(pool *p, regex_t * reg)
- {
- ap_block_alarms();
- regfree(reg);
- ap_kill_cleanup(p, (void *) reg, regex_cleanup);
- ap_unblock_alarms();
- }
-
- /*****************************************************************
- *
- * More grotty system stuff... subprocesses. Frump. These don't use
- * the generic cleanup interface because I don't want multiple
- * subprocesses to result in multiple three-second pauses; the
- * subprocesses have to be "freed" all at once. If someone comes
- * along with another resource they want to allocate which has the
- * same property, we might want to fold support for that into the
- * generic interface, but for now, it's a special case
- */
-
- struct process_chain {
- pid_t pid;
- enum kill_conditions kill_how;
- struct process_chain *next;
- };
-
- API_EXPORT(void) ap_note_subprocess(pool *a, pid_t pid, enum kill_conditions
- how) {
- struct process_chain *new =
- (struct process_chain *) ap_palloc(a, sizeof(struct process_chain));
-
- new->pid = pid;
- new->kill_how = how;
- new->next = a->subprocesses;
- a->subprocesses = new;
- }
-
- #ifdef WIN32
- #define os_pipe(fds) _pipe(fds, 512, O_BINARY | O_NOINHERIT)
- #else
- #define os_pipe(fds) pipe(fds)
- #endif /* WIN32 */
-
- /* for ap_fdopen, to get binary mode */
- #if defined (OS2) || defined (WIN32)
- #define BINMODE "b"
- #else
- #define BINMODE
- #endif
-
- static pid_t spawn_child_core(pool *p, int (*func) (void *, child_info *),
- void *data,enum kill_conditions kill_how,
- int *pipe_in, int *pipe_out, int *pipe_err)
- {
- pid_t pid;
- int in_fds[2];
- int out_fds[2];
- int err_fds[2];
- int save_errno;
-
- if (pipe_in && os_pipe(in_fds) < 0) {
- return 0;
- }
-
- if (pipe_out && os_pipe(out_fds) < 0) {
- save_errno = errno;
- if (pipe_in) {
- close(in_fds[0]);
- close(in_fds[1]);
- }
- errno = save_errno;
- return 0;
- }
-
- if (pipe_err && os_pipe(err_fds) < 0) {
- save_errno = errno;
- if (pipe_in) {
- close(in_fds[0]);
- close(in_fds[1]);
- }
- if (pipe_out) {
- close(out_fds[0]);
- close(out_fds[1]);
- }
- errno = save_errno;
- return 0;
- }
-
- #ifdef WIN32
-
- {
- HANDLE thread_handle;
- int hStdIn, hStdOut, hStdErr;
- int old_priority;
- child_info info;
-
- (void) ap_acquire_mutex(spawn_mutex);
- thread_handle = GetCurrentThread(); /* doesn't need to be closed */
- old_priority = GetThreadPriority(thread_handle);
- SetThreadPriority(thread_handle, THREAD_PRIORITY_HIGHEST);
- /* Now do the right thing with your pipes */
- if (pipe_in) {
- hStdIn = dup(fileno(stdin));
- if(dup2(in_fds[0], fileno(stdin)))
- ap_log_error(APLOG_MARK, APLOG_ERR, NULL, "dup2(stdin) failed");
- close(in_fds[0]);
- }
- if (pipe_out) {
- hStdOut = dup(fileno(stdout));
- close(fileno(stdout));
- if(dup2(out_fds[1], fileno(stdout)))
- ap_log_error(APLOG_MARK, APLOG_ERR, NULL, "dup2(stdout) failed");
- close(out_fds[1]);
- }
- if (pipe_err) {
- hStdErr = dup(fileno(stderr));
- if(dup2(err_fds[1], fileno(stderr)))
- ap_log_error(APLOG_MARK, APLOG_ERR, NULL, "dup2(stdin) failed");
- close(err_fds[1]);
- }
-
- info.hPipeInputRead = GetStdHandle(STD_INPUT_HANDLE);
- info.hPipeOutputWrite = GetStdHandle(STD_OUTPUT_HANDLE);
- info.hPipeErrorWrite = GetStdHandle(STD_ERROR_HANDLE);
-
- pid = (*func) (data, &info);
- if (pid == -1) pid = 0; /* map Win32 error code onto Unix default */
-
- if (!pid) {
- save_errno = errno;
- close(in_fds[1]);
- close(out_fds[0]);
- close(err_fds[0]);
- }
-
- /* restore the original stdin, stdout and stderr */
- if (pipe_in) {
- dup2(hStdIn, fileno(stdin));
- close(hStdIn);
- }
- if (pipe_out) {
- dup2(hStdOut, fileno(stdout));
- close(hStdOut);
- }
- if (pipe_err) {
- dup2(hStdErr, fileno(stderr));
- close(hStdErr);
- }
-
- if (pid) {
- ap_note_subprocess(p, pid, kill_how);
- if (pipe_in) {
- *pipe_in = in_fds[1];
- }
- if (pipe_out) {
- *pipe_out = out_fds[0];
- }
- if (pipe_err) {
- *pipe_err = err_fds[0];
- }
- }
- SetThreadPriority(thread_handle, old_priority);
- (void) ap_release_mutex(spawn_mutex);
- /*
- * go on to the end of the function, where you can
- * unblock alarms and return the pid
- */
-
- }
- #else
-
- if ((pid = fork()) < 0) {
- save_errno = errno;
- if (pipe_in) {
- close(in_fds[0]);
- close(in_fds[1]);
- }
- if (pipe_out) {
- close(out_fds[0]);
- close(out_fds[1]);
- }
- if (pipe_err) {
- close(err_fds[0]);
- close(err_fds[1]);
- }
- errno = save_errno;
- return 0;
- }
-
- if (!pid) {
- /* Child process */
- RAISE_SIGSTOP(SPAWN_CHILD);
-
- if (pipe_out) {
- close(out_fds[0]);
- dup2(out_fds[1], STDOUT_FILENO);
- close(out_fds[1]);
- }
-
- if (pipe_in) {
- close(in_fds[1]);
- dup2(in_fds[0], STDIN_FILENO);
- close(in_fds[0]);
- }
-
- if (pipe_err) {
- close(err_fds[0]);
- dup2(err_fds[1], STDERR_FILENO);
- close(err_fds[1]);
- }
-
- /* HP-UX SIGCHLD fix goes here, if someone will remind me what it is... */
- signal(SIGCHLD, SIG_DFL); /* Was that it? */
-
- func(data, NULL);
- exit(1); /* Should only get here if the exec in func() failed */
- }
-
- /* Parent process */
-
- ap_note_subprocess(p, pid, kill_how);
-
- if (pipe_out) {
- close(out_fds[1]);
- *pipe_out = out_fds[0];
- }
-
- if (pipe_in) {
- close(in_fds[0]);
- *pipe_in = in_fds[1];
- }
-
- if (pipe_err) {
- close(err_fds[1]);
- *pipe_err = err_fds[0];
- }
- #endif /* WIN32 */
-
- return pid;
- }
-
-
- API_EXPORT(int) ap_spawn_child(pool *p, int (*func) (void *, child_info *),
- void *data, enum kill_conditions kill_how,
- FILE **pipe_in, FILE **pipe_out,
- FILE **pipe_err)
- {
- int fd_in, fd_out, fd_err;
- pid_t pid;
- int save_errno;
-
- ap_block_alarms();
-
- pid = spawn_child_core(p, func, data, kill_how,
- pipe_in ? &fd_in : NULL,
- pipe_out ? &fd_out : NULL,
- pipe_err ? &fd_err : NULL);
-
- if (pid == 0) {
- save_errno = errno;
- ap_unblock_alarms();
- errno = save_errno;
- return 0;
- }
-
- if (pipe_out) {
- *pipe_out = ap_fdopen(fd_out, "r" BINMODE);
- if (*pipe_out)
- ap_note_cleanups_for_file(p, *pipe_out);
- else
- close(fd_out);
- }
-
- if (pipe_in) {
- *pipe_in = ap_fdopen(fd_in, "w" BINMODE);
- if (*pipe_in)
- ap_note_cleanups_for_file(p, *pipe_in);
- else
- close(fd_in);
- }
-
- if (pipe_err) {
- *pipe_err = ap_fdopen(fd_err, "r" BINMODE);
- if (*pipe_err)
- ap_note_cleanups_for_file(p, *pipe_err);
- else
- close(fd_err);
- }
-
- ap_unblock_alarms();
- return pid;
- }
-
- API_EXPORT(int) ap_bspawn_child(pool *p, int (*func) (void *, child_info *), void *data,
- enum kill_conditions kill_how,
- BUFF **pipe_in, BUFF **pipe_out, BUFF **pipe_err)
- {
- #ifdef WIN32
- SECURITY_ATTRIBUTES sa = {0};
- HANDLE hPipeOutputRead = NULL;
- HANDLE hPipeOutputWrite = NULL;
- HANDLE hPipeInputRead = NULL;
- HANDLE hPipeInputWrite = NULL;
- HANDLE hPipeErrorRead = NULL;
- HANDLE hPipeErrorWrite = NULL;
- HANDLE hPipeInputWriteDup = NULL;
- HANDLE hPipeOutputReadDup = NULL;
- HANDLE hPipeErrorReadDup = NULL;
- HANDLE hCurrentProcess;
- pid_t pid = 0;
- child_info info;
-
-
- ap_block_alarms();
-
- /*
- * First thing to do is to create the pipes that we will use for stdin, stdout, and
- * stderr in the child process.
- */
- sa.nLength = sizeof(sa);
- sa.bInheritHandle = TRUE;
- sa.lpSecurityDescriptor = NULL;
-
-
- /* Create pipes for standard input/output/error redirection. */
- if (pipe_in && !CreatePipe(&hPipeInputRead, &hPipeInputWrite, &sa, 0))
- return 0;
-
- if (pipe_out && !CreatePipe(&hPipeOutputRead, &hPipeOutputWrite, &sa, 0)) {
- if(pipe_in) {
- CloseHandle(hPipeInputRead);
- CloseHandle(hPipeInputWrite);
- }
- return 0;
- }
-
- if (pipe_err && !CreatePipe(&hPipeErrorRead, &hPipeErrorWrite, &sa, 0)) {
- if(pipe_in) {
- CloseHandle(hPipeInputRead);
- CloseHandle(hPipeInputWrite);
- }
- if(pipe_out) {
- CloseHandle(hPipeOutputRead);
- CloseHandle(hPipeOutputWrite);
- }
- return 0;
- }
- /*
- * When the pipe handles are created, the security descriptor
- * indicates that the handle can be inherited. However, we do not
- * want the server side handles to the pipe to be inherited by the
- * child CGI process. If the child CGI does inherit the server
- * side handles, then the child may be left around if the server
- * closes its handles (e.g. if the http connection is aborted),
- * because the child will have a valid copy of handles to both
- * sides of the pipes, and no I/O error will occur. Microsoft
- * recommends using DuplicateHandle to turn off the inherit bit
- * under NT and Win95.
- */
- hCurrentProcess = GetCurrentProcess();
- if ((pipe_in && !DuplicateHandle(hCurrentProcess, hPipeInputWrite,
- hCurrentProcess,
- &hPipeInputWriteDup, 0, FALSE,
- DUPLICATE_SAME_ACCESS))
- || (pipe_out && !DuplicateHandle(hCurrentProcess, hPipeOutputRead,
- hCurrentProcess, &hPipeOutputReadDup,
- 0, FALSE, DUPLICATE_SAME_ACCESS))
- || (pipe_err && !DuplicateHandle(hCurrentProcess, hPipeErrorRead,
- hCurrentProcess, &hPipeErrorReadDup,
- 0, FALSE, DUPLICATE_SAME_ACCESS))) {
- if (pipe_in) {
- CloseHandle(hPipeInputRead);
- CloseHandle(hPipeInputWrite);
- }
- if (pipe_out) {
- CloseHandle(hPipeOutputRead);
- CloseHandle(hPipeOutputWrite);
- }
- if (pipe_err) {
- CloseHandle(hPipeErrorRead);
- CloseHandle(hPipeErrorWrite);
- }
- return 0;
- }
- else {
- if (pipe_in) {
- CloseHandle(hPipeInputWrite);
- hPipeInputWrite = hPipeInputWriteDup;
- }
- if (pipe_out) {
- CloseHandle(hPipeOutputRead);
- hPipeOutputRead = hPipeOutputReadDup;
- }
- if (pipe_err) {
- CloseHandle(hPipeErrorRead);
- hPipeErrorRead = hPipeErrorReadDup;
- }
- }
-
- /* The script writes stdout to this pipe handle */
- info.hPipeOutputWrite = hPipeOutputWrite;
-
- /* The script reads stdin from this pipe handle */
- info.hPipeInputRead = hPipeInputRead;
-
- /* The script writes stderr to this pipe handle */
- info.hPipeErrorWrite = hPipeErrorWrite;
-
- /*
- * Try to launch the CGI. Under the covers, this call
- * will try to pick up the appropriate interpreter if
- * one is needed.
- */
- pid = func(data, &info);
- if (pid == -1) {
- /* Things didn't work, so cleanup */
- pid = 0; /* map Win32 error code onto Unix default */
- CloseHandle(hPipeOutputRead);
- CloseHandle(hPipeInputWrite);
- CloseHandle(hPipeErrorRead);
- }
- else {
- if (pipe_out) {
- /*
- * This pipe represents stdout for the script,
- * so we read from this pipe.
- */
- /* Create a read buffer */
- *pipe_out = ap_bcreate(p, B_RD);
-
- /* Setup the cleanup routine for the handle */
- ap_note_cleanups_for_h(p, hPipeOutputRead);
-
- /* Associate the handle with the new buffer */
- ap_bpushh(*pipe_out, hPipeOutputRead);
- }
-
- if (pipe_in) {
- /*
- * This pipe represents stdin for the script, so we
- * write to this pipe.
- */
- /* Create a write buffer */
- *pipe_in = ap_bcreate(p, B_WR);
-
- /* Setup the cleanup routine for the handle */
- ap_note_cleanups_for_h(p, hPipeInputWrite);
-
- /* Associate the handle with the new buffer */
- ap_bpushh(*pipe_in, hPipeInputWrite);
-
- }
-
- if (pipe_err) {
- /*
- * This pipe represents stderr for the script, so
- * we read from this pipe.
- */
- /* Create a read buffer */
- *pipe_err = ap_bcreate(p, B_RD);
-
- /* Setup the cleanup routine for the handle */
- ap_note_cleanups_for_h(p, hPipeErrorRead);
-
- /* Associate the handle with the new buffer */
- ap_bpushh(*pipe_err, hPipeErrorRead);
- }
- }
-
-
- /*
- * Now that handles have been inherited, close them to be safe.
- * You don't want to read or write to them accidentally, and we
- * sure don't want to have a handle leak.
- */
- CloseHandle(hPipeOutputWrite);
- CloseHandle(hPipeInputRead);
- CloseHandle(hPipeErrorWrite);
-
- #else
- int fd_in, fd_out, fd_err;
- pid_t pid;
- int save_errno;
-
- ap_block_alarms();
-
- pid = spawn_child_core(p, func, data, kill_how,
- pipe_in ? &fd_in : NULL,
- pipe_out ? &fd_out : NULL,
- pipe_err ? &fd_err : NULL);
-
- if (pid == 0) {
- save_errno = errno;
- ap_unblock_alarms();
- errno = save_errno;
- return 0;
- }
-
- if (pipe_out) {
- *pipe_out = ap_bcreate(p, B_RD);
- ap_note_cleanups_for_fd(p, fd_out);
- ap_bpushfd(*pipe_out, fd_out, fd_out);
- }
-
- if (pipe_in) {
- *pipe_in = ap_bcreate(p, B_WR);
- ap_note_cleanups_for_fd(p, fd_in);
- ap_bpushfd(*pipe_in, fd_in, fd_in);
- }
-
- if (pipe_err) {
- *pipe_err = ap_bcreate(p, B_RD);
- ap_note_cleanups_for_fd(p, fd_err);
- ap_bpushfd(*pipe_err, fd_err, fd_err);
- }
- #endif
-
- ap_unblock_alarms();
- return pid;
- }
-
- static void free_proc_chain(struct process_chain *procs)
- {
- /* Dispose of the subprocesses we've spawned off in the course of
- * whatever it was we're cleaning up now. This may involve killing
- * some of them off...
- */
-
- struct process_chain *p;
- int need_timeout = 0;
- int status;
-
- if (procs == NULL)
- return; /* No work. Whew! */
-
- /* First, check to see if we need to do the SIGTERM, sleep, SIGKILL
- * dance with any of the processes we're cleaning up. If we've got
- * any kill-on-sight subprocesses, ditch them now as well, so they
- * don't waste any more cycles doing whatever it is that they shouldn't
- * be doing anymore.
- */
- #ifdef WIN32
- /* Pick up all defunct processes */
- for (p = procs; p; p = p->next) {
- if (GetExitCodeProcess((HANDLE) p->pid, &status)) {
- p->kill_how = kill_never;
- }
- }
-
-
- for (p = procs; p; p = p->next) {
- if (p->kill_how == kill_after_timeout) {
- need_timeout = 1;
- }
- else if (p->kill_how == kill_always) {
- TerminateProcess((HANDLE) p->pid, 1);
- }
- }
- /* Sleep only if we have to... */
-
- if (need_timeout)
- sleep(3);
-
- /* OK, the scripts we just timed out for have had a chance to clean up
- * --- now, just get rid of them, and also clean up the system accounting
- * goop...
- */
-
- for (p = procs; p; p = p->next) {
- if (p->kill_how == kill_after_timeout)
- TerminateProcess((HANDLE) p->pid, 1);
- }
-
- for (p = procs; p; p = p->next) {
- CloseHandle((HANDLE) p->pid);
- }
- #else
- #ifndef NEED_WAITPID
- /* Pick up all defunct processes */
- for (p = procs; p; p = p->next) {
- if (waitpid(p->pid, (int *) 0, WNOHANG) > 0) {
- p->kill_how = kill_never;
- }
- }
- #endif
-
- for (p = procs; p; p = p->next) {
- if ((p->kill_how == kill_after_timeout)
- || (p->kill_how == kill_only_once)) {
- /* Subprocess may be dead already. Only need the timeout if not. */
- if (kill(p->pid, SIGTERM) != -1)
- need_timeout = 1;
- }
- else if (p->kill_how == kill_always) {
- kill(p->pid, SIGKILL);
- }
- }
-
- /* Sleep only if we have to... */
-
- if (need_timeout)
- sleep(3);
-
- /* OK, the scripts we just timed out for have had a chance to clean up
- * --- now, just get rid of them, and also clean up the system accounting
- * goop...
- */
-
- for (p = procs; p; p = p->next) {
-
- if (p->kill_how == kill_after_timeout)
- kill(p->pid, SIGKILL);
-
- if (p->kill_how != kill_never)
- waitpid(p->pid, &status, 0);
- }
- #endif /* WIN32 */
- }
-