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- /* -*-C-*-
- *******************************************************************************
- *
- * File: mailutil.c
- * RCS: /usr/local/sources/CVS/mailapp-utilities/mailutil.c,v 1.4 1997/04/19 17:37:24 tom Exp
- * Description: General purpose routines for Mail.app utilities
- * Author: Carl Edman
- * Created: Sun Apr 25 10:31:24 1993
- * Modified: Sat Apr 19 19:31:58 1997 Tom Hageman <tom@basil.icce.rug.nl>
- * Language: C
- * Package: N/A
- * Status: Experimental (Do Not Distribute)
- *
- * (C) Copyright 1993, but otherwise this file is perfect freeware.
- *
- *******************************************************************************
- */
-
- //#import <appkit/appkit.h>
- #import <stdlib.h>
- #import <fcntl.h>
- #import <stdio.h>
- #import <string.h>
- #import <unistd.h>
- #import <stdlib.h>
- #import <dirent.h>
- #import <netdb.h>
- #import <signal.h>
- #import <sys/file.h>
- #import <sys/param.h>
- #import <sys/types.h>
- #import <sys/stat.h>
- #import <sys/utsname.h>
- //#import <sys/dir.h>
- #import <errno.h>
- //#import <defaults/defaults.h>
- #import "mailutil.h"
- #import "optutil.h"
-
- extern const char *NXHomeDirectory(void);
- extern const char *NXUserName(void);
-
- static char origwd[MAXPATHLEN]="";
-
- #define MIN(a,b) (((a) < (b)) ? (a) : (b))
-
- int mailboxdir(char *buf)
- {
- int len;
- const char *str;
-
- if ((str=NULL)) /*NXGetDefaultValue("Mail","MailDir"))*/
- {
- strcpy(buf,str);
- }
- else
- {
- strcpy(buf,"~/Mailboxes");
- }
-
- if ((buf[0]=='~') && (buf[1]=='/'))
- {
- char temp[MAXPATHLEN];
- if (!(str=NULL) && !(str=getenv("HOME"))) return -1;
- strcpy(temp,buf+1);
- strcpy(buf,str);
- strcat(buf,temp);
- }
-
- len=strlen(buf);
-
- if (buf[len-1]=='/')
- {
- len--;
- buf[len]='\0';
- }
-
- return len;
- }
-
- static char *mboxname;
-
- int cd_mbox(const char *name,int createflag)
- {
- char mbox[MAXPATHLEN];
- int len;
-
- if (!*origwd) getcwd(origwd,MAXPATHLEN);
-
- /* hack: squirrel mbox name away, for error messages. */
- if ((mboxname = realloc(mboxname, strlen(name)+1))) strcpy(mboxname, name);
-
- if (*name=='/')
- {
- strcpy(mbox,name);
- }
- else
- {
- if ((len=mailboxdir(mbox))<0) return 1;
- mbox[len++]='/';
- strcpy(mbox+len,name);
- }
-
- len=strlen(mbox);
- if ((len<5)||(strcmp(mbox+len-5,".mbox"))) strcat(mbox,".mbox");
-
- if (access(mbox,(createflag?R_OK|W_OK:R_OK))==-1)
- {
- if (!(createflag && errno==ENOENT))
- {
- fprintf(stderr,"%s: %s: %s\n",progname(),mbox,strerror(errno));
- return 1;
- }
- if (mkdir(mbox,0755)==-1)
- {
- fprintf(stderr,"%s: %s: %s\n",progname(),mbox,strerror(errno));
- return 1;
- }
- }
-
- if (chdir(mbox)==-1)
- {
- fprintf(stderr,"%s: %s: %s\n",progname(),mbox,strerror(errno));
- return 1;
- }
-
- return 0;
- }
-
- int uncd_mbox(void)
- {
- if (!*origwd) return 1;
- if (chdir(origwd)==-1)
- {
- fprintf(stderr,"%s: %s: leaving directory: %s\n",progname(),mboxname,strerror(errno));
- return 1;
- }
- return 0;
- }
-
- int gethostname(char *name, int namelen)
- {
- struct utsname u;
-
- uname(&u);
- strncpy(name, u.nodename, namelen);
- name[namelen-1] = '\0';
- return 0;
- }
-
- const char *NXUserName(void)
- {
- const char *name;
- name = getenv("LOGNAME");
- if (name == NULL) {
- name = getenv("USER");
- if (name == NULL)
- name = "unknown";
- }
- return name;
- }
-
- int lock_mbox(int nowaitflg)
- {
- int fd,i;
- char line[LINELEN],localhost[MAXHOSTNAMELEN];
- int firsttime=1;
-
- gethostname(localhost,sizeof(localhost));
-
- while ((fd=open(".lock",O_CREAT|O_EXCL|O_WRONLY,0666))<0)
- {
- char *host="(unknown)",*user="(unknown)",*pid="";
-
- if (errno!=EEXIST)
- {
- fprintf(stderr,"%s: %s: locking: %s\n",progname(),mboxname,strerror(errno));
- return 1;
- }
- if ((fd=open(".lock",O_RDONLY))<0)
- {
- fprintf(stderr,"%s: %s: reading lock: %s\n",progname(),mboxname,strerror(errno));
- }
- else
- {
- if ((i=read(fd,line,sizeof(line)))<0)
- {
- fprintf(stderr,"%s: %s: reading lock: %s\n",progname(),mboxname,strerror(errno));
- }
- else
- {
- line[MIN(i,sizeof(line)-1)]='\0';
-
- host=line;
- for(user=host;*user && (*user!=',');user++);
- if (*user)
- {
- *user++='\0';
- for(pid=user;*pid && (*pid!=',');pid++);
- if (*pid) *pid++='\0';
- }
- }
- close(fd);
- }
- if (((i=atoi(pid))>0) && (strcmp(host,localhost)==0) && (kill(i,0)==-1) && (errno==ESRCH))
- {
- unlock_mbox();
- continue;
- }
-
- if (!nowaitflg)
- {
- if (firsttime)
- {
- fprintf(stderr,"%s: %s: waiting on lock by %s on %s (pid=%s)\n",progname(),mboxname,user,host,pid);
- firsttime=0;
- }
- sleep(5);
- continue;
- }
-
- fprintf(stderr,"%s: %s: already locked by %s on %s (pid=%s)\n",progname(),mboxname,user,host,pid);
- return 1;
- }
-
- sprintf(line,"%s,%s,%ld",localhost,NXUserName(),getpid());
- write(fd,line,strlen(line));
- close(fd);
- return 0;
- }
-
- int unlock_mbox(void)
- {
- if (unlink(".lock")<0)
- {
- fprintf(stderr,"%s: %s: unlocking: %s\n",progname(),mboxname,strerror(errno));
- return 1;
- }
- return 0;
- }
-
- time_t mtime(const char *path)
- {
- struct stat sb;
- if (stat(path,&sb)==-1) return -1;
- return(sb.st_mtime);
- }
-
- off_t filesize(const char *path)
- {
- struct stat sb;
- if (stat(path,&sb)==-1) return -1;
- return(sb.st_size);
- }
-
- int dirsize(char *path)
- {
- struct stat sb;
- int size,i,len;
- DIR *dir;
- struct dirent *dp;
-
- if (lstat(path,&sb)==-1) return -1;
- size=sb.st_blocks*DEV_BSIZE;
-
- if (!(sb.st_mode&S_IFDIR)) return size;
- if (!(dir=opendir(path))) return -1;
-
- len=strlen(path);
-
- while((dp=readdir(dir)))
- {
- if (!strcmp(dp->d_name,".")||
- !strcmp(dp->d_name,"..")) continue;
- if ((len>0) || (path[len-1]!='/'))
- {
- path[len]='/'; path[len+1]='\0';
- }
-
- strcat(path,dp->d_name);
- i=dirsize(path);
- path[len]='\0';
- if (i==-1) return -1;
- size+=i;
- }
-
- closedir(dir);
-
- return size;
- }
-
- static void forall_mboxes_recurse(char *path,void (*func)(const char *))
- {
- int len;
- struct stat sb;
- DIR *dir;
- struct dirent *dp;
-
- if (stat(path,&sb)==-1) return;
- if (!(sb.st_mode&S_IFDIR)) return;
-
- len=strlen(path);
-
- if ((len>5)&&(!strcmp(path+len-5,".mbox")))
- {
- func(path);
- return;
- }
-
- if (!(dir=opendir(path))) return;
-
- while((dp=readdir(dir)))
- {
- if (!strcmp(dp->d_name,".")||
- !strcmp(dp->d_name,"..")) continue;
- if ((len>0) || (path[len-1]!='/'))
- {
- path[len]='/'; path[len+1]='\0';
- }
-
- strcat(path,dp->d_name);
- forall_mboxes_recurse(path,func);
- path[len]='\0';
- }
-
- closedir(dir);
- }
-
- void forall_mboxes(void (*func)(const char *))
- {
- char path[MAXPATHLEN];
-
- if (mailboxdir(path)<0) return;
- forall_mboxes_recurse(path,func);
- }
-
- char *strpcpy(char *to,const char *beg,const char *end)
- {
- strncpy(to,beg,end-beg);
- to[end-beg]='\0';
- return to;
- }
-
- int strpequ(char *to,const char *beg,const char *end)
- {
- int len=strlen(to);
- return (len==end-beg)&&(!strncmp(to,beg,len));
- }
-
- int strpcaseequ(char *to,const char *beg,const char *end)
- {
- int len=strlen(to);
- return (len==end-beg)&&(!strncasecmp(to,beg,len));
- }
-
- char *strpcat(char *to,const char *beg,const char *end)
- {
- strpcpy(to+strlen(to),beg,end);
- return to;
- }
-
- void appstring(char **string,int *len,int *maxlen,const char *app,const int alen)
- {
- if (*string==0)
- {
- *maxlen=LINELEN;
- *string=malloc(*maxlen);
- *len=0;
- }
-
- while (alen+*len>*maxlen)
- {
- *maxlen*=2;
- *string=realloc(*string,*maxlen);
- }
-
- memmove(*string+*len,app,alen);
- *len+=alen;
- }
-
- char *growstring(char **string,int *len,int *maxlen,const int alen)
- {
- if (*string==0)
- {
- *maxlen=LINELEN;
- *string=malloc(*maxlen);
- *len=0;
- }
-
- while (alen+*len>*maxlen)
- {
- *maxlen*=2;
- *string=realloc(*string,*maxlen);
- }
-
- return *string+*len;
- }
-
- /* 32-bit CRC table from Gary S. Browns crc program */
- static unsigned long int crc32tab[] = { /* CRC polynomial 0xedb88320 */
- 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
- 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
- 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
- 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
- 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
- 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
- 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
- 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
- 0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
- 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
- 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
- 0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
- 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
- 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
- 0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
- 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
- 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
- 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
- 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
- 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
- 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
- 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
- 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
- 0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
- 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
- 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
- 0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
- 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
- 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
- 0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
- 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
- 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
- };
-
- unsigned long int calc_crc(const char *beg,int len)
- {
- const char *c;
- unsigned long int crc=0xffffffff;
- for(c=beg;c<beg+len;c++) crc=crc32tab[(crc^*c) & 0xff]^(crc>>8);
- return ~crc;
- }
-
-