| 1 |
– |
/* Copyright (c) 1991 Regents of the University of California */ |
| 2 |
– |
|
| 1 |
|
#ifndef lint |
| 2 |
< |
static char SCCSid[] = "$SunId$ LBL"; |
| 2 |
> |
static const char RCSid[] = "$Id$"; |
| 3 |
|
#endif |
| 6 |
– |
|
| 4 |
|
/* |
| 5 |
|
* getpath.c - function to search for file in a list of directories |
| 6 |
+ |
* |
| 7 |
+ |
* External symbols declared in standard.h |
| 8 |
|
*/ |
| 9 |
|
|
| 10 |
< |
#define NULL 0 |
| 10 |
> |
#include "copyright.h" |
| 11 |
|
|
| 12 |
< |
#ifndef NIX |
| 13 |
< |
#include <pwd.h> |
| 15 |
< |
#endif |
| 12 |
> |
#include <string.h> |
| 13 |
> |
#include <ctype.h> |
| 14 |
|
|
| 15 |
< |
#ifndef DIRSEP |
| 16 |
< |
#define DIRSEP '/' |
| 19 |
< |
#endif |
| 20 |
< |
#ifndef PATHSEP |
| 21 |
< |
#define PATHSEP ':' |
| 22 |
< |
#endif |
| 15 |
> |
#include "paths.h" |
| 16 |
> |
#include "rtio.h" |
| 17 |
|
|
| 24 |
– |
extern char *strcpy(), *strcat(), *getenv(); |
| 25 |
– |
extern struct passwd *getpwnam(); |
| 18 |
|
|
| 19 |
< |
|
| 19 |
> |
#ifdef _WIN32 |
| 20 |
> |
static char * |
| 21 |
> |
core_getpath /* wrapped below: expand fname, return full path */ |
| 22 |
> |
#else |
| 23 |
|
char * |
| 24 |
< |
getpath(fname, searchpath, mode) /* expand fname, return full path */ |
| 30 |
< |
register char *fname; |
| 31 |
< |
register char *searchpath; |
| 32 |
< |
int mode; |
| 33 |
< |
{ |
| 34 |
< |
#ifndef NIX |
| 35 |
< |
struct passwd *pwent; |
| 24 |
> |
getpath /* expand fname, return full path */ |
| 25 |
|
#endif |
| 26 |
< |
static char pname[256]; |
| 26 |
> |
( |
| 27 |
> |
register char *fname, |
| 28 |
> |
register char *searchpath, |
| 29 |
> |
int mode |
| 30 |
> |
) |
| 31 |
> |
{ |
| 32 |
> |
static char pname[PATH_MAX]; |
| 33 |
> |
char uname[512]; |
| 34 |
|
register char *cp; |
| 35 |
+ |
int i; |
| 36 |
|
|
| 37 |
< |
if (fname == NULL) |
| 41 |
< |
return(NULL); |
| 37 |
> |
if (fname == NULL) { return(NULL); } |
| 38 |
|
|
| 39 |
< |
switch (*fname) { |
| 40 |
< |
case DIRSEP: /* relative to root */ |
| 41 |
< |
case '.': /* relative to cwd */ |
| 42 |
< |
strcpy(pname, fname); |
| 43 |
< |
return(pname); |
| 44 |
< |
#ifndef NIX |
| 45 |
< |
case '~': /* relative to home directory */ |
| 46 |
< |
fname++; |
| 47 |
< |
if (*fname == '\0' || *fname == DIRSEP) { /* ours */ |
| 48 |
< |
if ((cp = getenv("HOME")) == NULL) |
| 49 |
< |
return(NULL); |
| 50 |
< |
strcpy(pname, cp); |
| 51 |
< |
strcat(pname, fname); |
| 52 |
< |
return(pname); |
| 39 |
> |
pname[0] = '\0'; /* check for full specification */ |
| 40 |
> |
|
| 41 |
> |
if (ISABS(fname)) { /* absolute path */ |
| 42 |
> |
strncpy(pname, fname, sizeof(pname)-1); |
| 43 |
> |
} else { |
| 44 |
> |
switch (*fname) { |
| 45 |
> |
case '.': /* relative to cwd */ |
| 46 |
> |
strncpy(pname, fname, sizeof(pname)-1); |
| 47 |
> |
break; |
| 48 |
> |
case '~': /* relative to home directory */ |
| 49 |
> |
fname++; |
| 50 |
> |
cp = uname; |
| 51 |
> |
for (i=0;i<sizeof(uname)&&*fname!='\0'&&!ISDIRSEP(*fname);i++) |
| 52 |
> |
*cp++ = *fname++; |
| 53 |
> |
*cp = '\0'; |
| 54 |
> |
cp = gethomedir(uname, pname, sizeof(pname)); |
| 55 |
> |
if(cp == NULL) return NULL; |
| 56 |
> |
strncat(pname, fname, sizeof(pname)-strlen(pname)-1); |
| 57 |
> |
break; |
| 58 |
|
} |
| 58 |
– |
cp = pname; /* user */ |
| 59 |
– |
do |
| 60 |
– |
*cp++ = *fname++; |
| 61 |
– |
while (*fname && *fname != DIRSEP); |
| 62 |
– |
*cp = '\0'; |
| 63 |
– |
if ((pwent = getpwnam(pname)) == NULL) |
| 64 |
– |
return(NULL); |
| 65 |
– |
strcpy(pname, pwent->pw_dir); |
| 66 |
– |
strcat(pname, fname); |
| 67 |
– |
return(pname); |
| 68 |
– |
#endif |
| 59 |
|
} |
| 60 |
+ |
if (pname[0]) /* got it, check access if search requested */ |
| 61 |
+ |
return(searchpath==NULL||access(pname,mode)==0 ? pname : NULL); |
| 62 |
|
|
| 63 |
|
if (searchpath == NULL) { /* don't search */ |
| 64 |
< |
strcpy(pname, fname); |
| 64 |
> |
strncpy(pname, fname, sizeof(pname)-1); |
| 65 |
|
return(pname); |
| 66 |
|
} |
| 67 |
< |
/* check search path */ |
| 67 |
> |
/* check search path */ |
| 68 |
|
do { |
| 69 |
|
cp = pname; |
| 70 |
< |
while (*searchpath && (*cp = *searchpath++) != PATHSEP) |
| 70 |
> |
while (*searchpath && (*cp = *searchpath++) != PATHSEP) { |
| 71 |
|
cp++; |
| 72 |
< |
if (cp > pname && cp[-1] != DIRSEP) |
| 72 |
> |
} |
| 73 |
> |
if (cp > pname && !ISDIRSEP(cp[-1])) { |
| 74 |
|
*cp++ = DIRSEP; |
| 75 |
< |
strcpy(cp, fname); |
| 75 |
> |
} |
| 76 |
> |
strncpy(cp, fname, sizeof(pname)-strlen(pname)-1); |
| 77 |
|
if (access(pname, mode) == 0) /* file accessable? */ |
| 78 |
|
return(pname); |
| 79 |
|
} while (*searchpath); |
| 80 |
< |
/* not found */ |
| 80 |
> |
/* not found */ |
| 81 |
|
return(NULL); |
| 82 |
|
} |
| 83 |
+ |
|
| 84 |
+ |
|
| 85 |
+ |
#ifdef _WIN32 |
| 86 |
+ |
/* This is a wrapper around the above, "emulating" access mode X_OK, |
| 87 |
+ |
which is not supported on Windows. |
| 88 |
+ |
If we see X_OK and the filename has no extension, then we'll remove |
| 89 |
+ |
the X_OK from the mode, append ".exe" to the file name, and search |
| 90 |
+ |
with the resulting string. If that fails, we'll try again with ".bat". |
| 91 |
+ |
Theoretically, we might still not have execute rights on a file we find |
| 92 |
+ |
like this, but that's rare enough not to be worth checking the ACLs. |
| 93 |
+ |
*/ |
| 94 |
+ |
char * |
| 95 |
+ |
getpath( /* expand fname, return full path */ |
| 96 |
+ |
register char *ffname, |
| 97 |
+ |
register char *searchpath, |
| 98 |
+ |
int mode |
| 99 |
+ |
) |
| 100 |
+ |
{ |
| 101 |
+ |
register char *cp; |
| 102 |
+ |
char fname[PATH_MAX]; |
| 103 |
+ |
|
| 104 |
+ |
if (ffname == NULL) |
| 105 |
+ |
return(NULL); |
| 106 |
+ |
|
| 107 |
+ |
/* if we have a dot in the string, we assume there is a file name |
| 108 |
+ |
extension present */ |
| 109 |
+ |
/* XXX We'd better test for .exe/.bat/.etc explicitly */ |
| 110 |
+ |
if (!(mode & X_OK) || (strrchr(ffname, '.') != NULL)) { |
| 111 |
+ |
return core_getpath(ffname, searchpath, mode); |
| 112 |
+ |
} |
| 113 |
+ |
|
| 114 |
+ |
/* We're looking for an executable, Windows doesn't have X_OK. */ |
| 115 |
+ |
mode &= ~X_OK; |
| 116 |
+ |
/* Append .exe */ |
| 117 |
+ |
strncpy(fname, ffname, sizeof(fname)-5); |
| 118 |
+ |
strcat(fname, ".exe"); |
| 119 |
+ |
cp = core_getpath(fname, searchpath, mode); |
| 120 |
+ |
if (cp != NULL) return cp; |
| 121 |
+ |
|
| 122 |
+ |
/* Try with .bat this time... */ |
| 123 |
+ |
strncpy(fname, ffname, sizeof(fname)-5); |
| 124 |
+ |
strcat(fname, ".bat"); |
| 125 |
+ |
cp = core_getpath(fname, searchpath, mode); |
| 126 |
+ |
return cp; |
| 127 |
+ |
} |
| 128 |
+ |
#endif /* _WIN32 */ |
| 129 |
+ |
|
| 130 |
+ |
|
| 131 |
+ |
#ifdef TEST_MODULE |
| 132 |
+ |
int main() |
| 133 |
+ |
{ |
| 134 |
+ |
char * fp; |
| 135 |
+ |
char fmt[] = "%15s %-10s %s: %s\n"; |
| 136 |
+ |
|
| 137 |
+ |
fp = getpath("rayinit.cal", getenv("RAYPATH"), R_OK); |
| 138 |
+ |
printf(fmt, "rayinit.cal", "RAYPATH", "R_OK", fp); |
| 139 |
+ |
fp = getpath("mkillum", getenv("PATH"), X_OK); |
| 140 |
+ |
printf(fmt, "mkillum", "PATH", "X_OK", fp); |
| 141 |
+ |
fp = getpath("/", getenv("PATH"), W_OK); |
| 142 |
+ |
printf(fmt, "/", "PATH", "W_OK", fp); |
| 143 |
+ |
fp = getpath("~", getenv("PATH"), F_OK); |
| 144 |
+ |
printf(fmt, "~", "PATH", "F_OK", fp); |
| 145 |
+ |
printf("Undefining HOME and HOMEPATH\n"); |
| 146 |
+ |
unsetenv("HOME"); |
| 147 |
+ |
unsetenv("HOMEPATH"); |
| 148 |
+ |
fp = getpath("~", getenv("PATH"), F_OK); |
| 149 |
+ |
printf(fmt, "~", "PATH", "F_OK", fp); |
| 150 |
+ |
fp = getpath("~lp/blah", getenv("PATH"), F_OK); |
| 151 |
+ |
printf(fmt, "~lp/blah", "PATH", "F_OK", fp); |
| 152 |
+ |
} |
| 153 |
+ |
#endif |
| 154 |
+ |
|
