| 1 |
greg |
1.1 |
#ifndef lint
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| 2 |
greg |
2.9 |
static const char RCSid[] = "$Id$";
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| 3 |
greg |
1.1 |
#endif
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| 4 |
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/*
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| 5 |
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* getpath.c - function to search for file in a list of directories
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| 6 |
greg |
2.9 |
*
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| 7 |
|
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* External symbols declared in standard.h
|
| 8 |
|
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*/
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| 9 |
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| 10 |
greg |
2.10 |
#include "copyright.h"
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| 11 |
greg |
1.1 |
|
| 12 |
greg |
2.7 |
#include "standard.h"
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| 13 |
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|
| 14 |
greg |
2.6 |
#include "paths.h"
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| 15 |
greg |
2.5 |
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| 16 |
greg |
2.7 |
#ifndef NIX
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| 17 |
greg |
1.1 |
#include <pwd.h>
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| 18 |
greg |
2.5 |
extern struct passwd *getpwnam();
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| 19 |
greg |
2.4 |
#endif
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| 20 |
greg |
1.1 |
|
| 21 |
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| 22 |
|
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char *
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| 23 |
|
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getpath(fname, searchpath, mode) /* expand fname, return full path */
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| 24 |
|
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register char *fname;
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| 25 |
|
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register char *searchpath;
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| 26 |
|
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int mode;
|
| 27 |
|
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{
|
| 28 |
greg |
2.7 |
#ifndef NIX
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| 29 |
greg |
2.4 |
struct passwd *pwent;
|
| 30 |
|
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#endif
|
| 31 |
greg |
2.6 |
static char pname[MAXPATH];
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| 32 |
greg |
1.1 |
register char *cp;
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| 33 |
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| 34 |
|
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if (fname == NULL)
|
| 35 |
|
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return(NULL);
|
| 36 |
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|
| 37 |
greg |
2.8 |
pname[0] = '\0'; /* check for full specification */
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| 38 |
greg |
1.1 |
switch (*fname) {
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| 39 |
greg |
2.6 |
CASEDIRSEP: /* relative to root */
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| 40 |
greg |
1.1 |
case '.': /* relative to cwd */
|
| 41 |
|
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strcpy(pname, fname);
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| 42 |
greg |
2.8 |
break;
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| 43 |
greg |
2.3 |
#ifndef NIX
|
| 44 |
greg |
1.1 |
case '~': /* relative to home directory */
|
| 45 |
|
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fname++;
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| 46 |
greg |
2.6 |
if (*fname == '\0' || ISDIRSEP(*fname)) { /* ours */
|
| 47 |
greg |
1.1 |
if ((cp = getenv("HOME")) == NULL)
|
| 48 |
|
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return(NULL);
|
| 49 |
|
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strcpy(pname, cp);
|
| 50 |
|
|
strcat(pname, fname);
|
| 51 |
greg |
2.8 |
break;
|
| 52 |
greg |
1.1 |
}
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| 53 |
|
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cp = pname; /* user */
|
| 54 |
|
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do
|
| 55 |
|
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*cp++ = *fname++;
|
| 56 |
greg |
2.6 |
while (*fname && !ISDIRSEP(*fname));
|
| 57 |
greg |
1.1 |
*cp = '\0';
|
| 58 |
|
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if ((pwent = getpwnam(pname)) == NULL)
|
| 59 |
|
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return(NULL);
|
| 60 |
|
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strcpy(pname, pwent->pw_dir);
|
| 61 |
|
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strcat(pname, fname);
|
| 62 |
greg |
2.8 |
break;
|
| 63 |
greg |
2.3 |
#endif
|
| 64 |
greg |
1.1 |
}
|
| 65 |
greg |
2.8 |
if (pname[0]) /* got it, check access if search requested */
|
| 66 |
|
|
return(searchpath==NULL||access(pname,mode)==0 ? pname : NULL);
|
| 67 |
greg |
1.1 |
|
| 68 |
|
|
if (searchpath == NULL) { /* don't search */
|
| 69 |
|
|
strcpy(pname, fname);
|
| 70 |
|
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return(pname);
|
| 71 |
|
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}
|
| 72 |
|
|
/* check search path */
|
| 73 |
|
|
do {
|
| 74 |
|
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cp = pname;
|
| 75 |
greg |
2.3 |
while (*searchpath && (*cp = *searchpath++) != PATHSEP)
|
| 76 |
|
|
cp++;
|
| 77 |
greg |
2.6 |
if (cp > pname && !ISDIRSEP(cp[-1]))
|
| 78 |
greg |
2.3 |
*cp++ = DIRSEP;
|
| 79 |
greg |
1.1 |
strcpy(cp, fname);
|
| 80 |
|
|
if (access(pname, mode) == 0) /* file accessable? */
|
| 81 |
|
|
return(pname);
|
| 82 |
|
|
} while (*searchpath);
|
| 83 |
|
|
/* not found */
|
| 84 |
|
|
return(NULL);
|
| 85 |
|
|
}
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