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greg |
2.5 |
/* Copyright (c) 1992 Regents of the University of California */ |
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greg |
1.1 |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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#endif |
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/* |
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* getpath.c - function to search for file in a list of directories |
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*/ |
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greg |
2.7 |
#include "standard.h" |
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greg |
2.6 |
#include "paths.h" |
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greg |
2.5 |
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greg |
2.7 |
#ifndef NIX |
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greg |
1.1 |
#include <pwd.h> |
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greg |
2.5 |
extern struct passwd *getpwnam(); |
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greg |
2.4 |
#endif |
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greg |
1.1 |
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char * |
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getpath(fname, searchpath, mode) /* expand fname, return full path */ |
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register char *fname; |
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register char *searchpath; |
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int mode; |
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{ |
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greg |
2.7 |
#ifndef NIX |
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greg |
2.4 |
struct passwd *pwent; |
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#endif |
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greg |
2.6 |
static char pname[MAXPATH]; |
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greg |
1.1 |
register char *cp; |
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if (fname == NULL) |
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return(NULL); |
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greg |
2.8 |
pname[0] = '\0'; /* check for full specification */ |
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greg |
1.1 |
switch (*fname) { |
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greg |
2.6 |
CASEDIRSEP: /* relative to root */ |
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greg |
1.1 |
case '.': /* relative to cwd */ |
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strcpy(pname, fname); |
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greg |
2.8 |
break; |
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greg |
2.3 |
#ifndef NIX |
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greg |
1.1 |
case '~': /* relative to home directory */ |
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fname++; |
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greg |
2.6 |
if (*fname == '\0' || ISDIRSEP(*fname)) { /* ours */ |
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greg |
1.1 |
if ((cp = getenv("HOME")) == NULL) |
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return(NULL); |
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strcpy(pname, cp); |
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strcat(pname, fname); |
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greg |
2.8 |
break; |
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greg |
1.1 |
} |
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cp = pname; /* user */ |
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do |
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*cp++ = *fname++; |
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greg |
2.6 |
while (*fname && !ISDIRSEP(*fname)); |
| 56 |
greg |
1.1 |
*cp = '\0'; |
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if ((pwent = getpwnam(pname)) == NULL) |
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return(NULL); |
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strcpy(pname, pwent->pw_dir); |
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strcat(pname, fname); |
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greg |
2.8 |
break; |
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greg |
2.3 |
#endif |
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greg |
1.1 |
} |
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greg |
2.8 |
if (pname[0]) /* got it, check access if search requested */ |
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return(searchpath==NULL||access(pname,mode)==0 ? pname : NULL); |
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greg |
1.1 |
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| 67 |
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if (searchpath == NULL) { /* don't search */ |
| 68 |
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strcpy(pname, fname); |
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return(pname); |
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} |
| 71 |
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/* check search path */ |
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do { |
| 73 |
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cp = pname; |
| 74 |
greg |
2.3 |
while (*searchpath && (*cp = *searchpath++) != PATHSEP) |
| 75 |
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cp++; |
| 76 |
greg |
2.6 |
if (cp > pname && !ISDIRSEP(cp[-1])) |
| 77 |
greg |
2.3 |
*cp++ = DIRSEP; |
| 78 |
greg |
1.1 |
strcpy(cp, fname); |
| 79 |
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if (access(pname, mode) == 0) /* file accessable? */ |
| 80 |
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return(pname); |
| 81 |
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} while (*searchpath); |
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/* not found */ |
| 83 |
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return(NULL); |
| 84 |
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} |
