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SEARCH.C
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C/C++ Source or Header
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1990-11-25
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8KB
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265 lines
/*
* The search routine takes a directory list, separated by PATHSEP, and
* tries to open a file. Null directory components indicate current
* directory. if the file SUBDIR exists and the file is a font file,
* it checks for the file in a subdirectory named the same as the font name.
* Returns the open file descriptor if ok, else NULL.
*/
#include "structures.h" /* The copyright notice in that file is included too! */
#include <ctype.h>
#ifdef SYSV
#define MAXPATHLEN (256)
#else
#ifdef VMS
#define MAXPATHLEN (256)
#else /* ~SYSV */
#include <sys/param.h> /* for MAXPATHLEN */
#endif /* ~SYSV */
#endif
#ifndef MSDOS
#ifndef VMS
#include <pwd.h>
#endif
#endif
/*
*
* We hope MAXPATHLEN is enough -- only rudimentary checking is done!
*/
#ifdef DEBUG
extern integer debug_flag;
#endif /* DEBUG */
extern char *mfmode ;
extern int actualdpi ;
FILE *
search(path, file, mode)
char *path, *file, *mode ;
{
extern char *getenv(), *newstring() ;
register char *nam ; /* index into fname */
register FILE *fd ; /* file desc of file */
char fname[MAXPATHLEN] ; /* to store file name */
static char *home = 0 ; /* home is where the heart is */
if (*file == DIRSEP) { /* if full path name */
if ((fd=fopen(file,mode)) != NULL)
return(fd) ;
else
return(NULL) ;
}
#ifdef MSDOS
if ( isalpha(file[0]) && file[1]==':' ) { /* if full path name */
if ((fd=fopen(file,mode)) != NULL)
return(fd) ;
else
return(NULL) ;
}
#endif
do {
/* copy the current directory into fname */
nam = fname;
/* copy till PATHSEP */
if (*path == '~') {
char *p = nam ;
path++ ;
while (*path && *path != PATHSEP && *path != DIRSEP)
*p++ = *path++ ;
*p = 0 ;
if (*nam == 0) {
if (home == 0) {
if (home = getenv("HOME"))
home = newstring(home) ;
else
home = "." ;
}
strcpy(fname, home) ;
} else {
#ifdef MSDOS
error("! ~username in path???") ;
#else
#ifdef VMS
error("! ~username in path???") ;
#else
struct passwd *pw = getpwnam(fname) ;
if (pw)
strcpy(fname, pw->pw_dir) ;
else
error("no such user") ;
#endif
#endif
}
nam = fname + strlen(fname) ;
}
while (*path != PATHSEP && *path) *nam++ = *path++;
*nam = 0 ;
#ifndef VMS
if (nam == fname) *nam++ = '.'; /* null component is current dir */
if (*file != '\0') {
*nam++ = DIRSEP; /* add separator */
(void)strcpy(nam,file); /* tack the file on */
}
else
*nam = '\0' ;
#else
(void)strcpy(nam,file); /* tack the file on */
#endif
/* belated check -- bah! */
if ((nam - fname) + strlen(file) + 1 > MAXPATHLEN)
error("! overran allocated storage in search()");
#ifdef DEBUG
if (dd(D_PATHS))
(void)fprintf(stderr,"Trying to open %s\n", fname) ;
#endif
if ((fd=fopen(fname,mode)) != NULL)
return(fd);
/* skip over PATHSEP and try again */
} while (*(path++));
return(NULL);
} /* end search */
FILE *
pksearch(path, file, mode, n, dpi)
char *path, *file, *mode ;
char *n ;
halfword dpi ;
{
extern char *getenv(), *newstring() ;
register char *nam ; /* index into fname */
register FILE *fd ; /* file desc of file */
char fname[MAXPATHLEN] ; /* to store file name */
static char *home = 0 ; /* home is where the heart is */
for (nam=path; *nam; nam++)
if (*nam == '%')
break ;
if (*nam == 0)
return search(path, file, mode) ;
if (*file == DIRSEP) { /* if full path name */
if ((fd=fopen(file,mode)) != NULL)
return(fd) ;
else
return(NULL) ;
}
#ifdef MSDOS
if ( isalpha(file[0]) && file[1]==':' ) { /* if full path name */
if ((fd=fopen(file,mode)) != NULL)
return(fd) ;
else
return(NULL) ;
}
#endif
do {
/* copy the current directory into fname */
nam = fname;
/* copy till PATHSEP */
if (*path == '~') {
char *p = nam ;
path++ ;
while (*path && *path != PATHSEP && *path != DIRSEP)
*p++ = *path++ ;
*p = 0 ;
if (*nam == 0) {
if (home == 0) {
if (home = getenv("HOME"))
home = newstring(home) ;
else
home = "." ;
}
strcpy(fname, home) ;
} else {
#ifdef MSDOS
error("! ~username in path???") ;
#else
#ifdef VMS
error("! ~username in path???") ;
#else
struct passwd *pw = getpwnam(fname) ;
if (pw)
strcpy(fname, pw->pw_dir) ;
else
error("no such user") ;
#endif
#endif
}
nam = fname + strlen(fname) ;
}
/* copy till PATHSEP */
while (*path != PATHSEP && *path) {
if (*path == '%') {
path++ ;
switch(*path) {
case 'd': sprintf(nam, "%d", dpi) ; break ;
case 'f': strcpy(nam, n) ; break ;
case 'm': if (mfmode == 0)
if (actualdpi == 300) mfmode = "imagen" ;
else if (actualdpi == 400) mfmode = "nexthi" ;
else if (actualdpi == 635) mfmode = "linolo" ;
else if (actualdpi == 1270) mfmode = "linohi" ;
else if (actualdpi == 2540) mfmode = "linosuper" ;
if (mfmode == 0)
error("! MF mode not set, but used in pk path") ;
strcpy(nam, mfmode) ;
break ;
case 'p': strcpy(nam, "pk") ; break ;
case '%': strcpy(nam, "%") ; break ;
default: error("! bad format character in pk path") ;
}
nam = fname + strlen(fname) ;
if (*path)
path++ ;
} else
*nam++ = *path++;
}
#ifndef VMS
if (nam == fname) *nam++ = '.'; /* null component is current dir */
#endif /* VMS */
*nam = '\0' ;
/* belated check -- bah! */
if (strlen(fname) + 1 > MAXPATHLEN)
error("! overran allocated storage in search()");
#ifdef DEBUG
if (dd(D_PATHS))
(void)fprintf(stderr,"Trying to open %s\n", fname) ;
#endif
if ((fd=fopen(fname,mode)) != NULL)
return(fd);
/* skip over PATHSEP and try again */
} while (*(path++));
return(NULL);
} /* end search */
/* do we report file openings? */
#ifdef DEBUG
#ifdef fopen
#undef fopen
#endif
FILE *my_real_fopen(n, t)
register char *n, *t ;
{
FILE *tf ;
if (dd(D_FILES)) {
fprintf(stderr, "<%s(%s)> ", n, t) ;
tf = fopen(n, t) ;
if (tf == 0)
fprintf(stderr, "failed\n") ;
else
fprintf(stderr, "succeeded\n") ;
} else
tf = fopen(n, t) ;
return tf ;
}
#endif