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greg |
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/* Copyright (c) 1991 Regents of the University of California */ |
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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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#define NULL 0 |
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#include <pwd.h> |
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extern char *strcpy(), *strcat(), *getenv(); |
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extern struct passwd *getpwnam(); |
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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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static char pname[256]; |
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struct passwd *pwent; |
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register char *cp; |
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if (fname == NULL) |
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return(NULL); |
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switch (*fname) { |
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case '/': /* relative to root */ |
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case '.': /* relative to cwd */ |
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strcpy(pname, fname); |
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return(pname); |
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case '~': /* relative to home directory */ |
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fname++; |
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if (*fname == '\0' || *fname == '/') { /* ours */ |
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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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return(pname); |
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} |
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cp = pname; /* user */ |
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do |
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*cp++ = *fname++; |
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while (*fname && *fname != '/'); |
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*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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return(pname); |
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} |
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if (searchpath == NULL) { /* don't search */ |
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strcpy(pname, fname); |
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return(pname); |
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} |
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/* check search path */ |
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do { |
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cp = pname; |
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while (*searchpath && (*cp = *searchpath++) != ':') |
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cp++; |
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if (cp > pname && cp[-1] != '/') |
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*cp++ = '/'; |
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strcpy(cp, fname); |
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if (access(pname, mode) == 0) /* file accessable? */ |
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return(pname); |
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} while (*searchpath); |
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/* not found */ |
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return(NULL); |
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} |
