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56 lines
1.3 KiB
C
56 lines
1.3 KiB
C
/** \ingroup popt
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* \file popt/findme.c
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*/
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/* (C) 1998-2002 Red Hat, Inc. -- Licensing details are in the COPYING
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file accompanying popt source distributions, available from
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ftp://ftp.rpm.org/pub/rpm/dist. */
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#include "system.h"
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#include "findme.h"
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const char * findProgramPath(const char * argv0)
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{
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char * path = getenv("PATH");
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char * pathbuf;
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char * start, * chptr;
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char * buf;
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size_t bufsize;
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if (argv0 == NULL) return NULL; /* XXX can't happen */
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/* If there is a / in the argv[0], it has to be an absolute path */
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if (strchr(argv0, '/'))
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return xstrdup(argv0);
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if (path == NULL) return NULL;
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bufsize = strlen(path) + 1;
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start = pathbuf = alloca(bufsize);
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if (pathbuf == NULL) return NULL; /* XXX can't happen */
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strlcpy(pathbuf, path, bufsize);
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bufsize += sizeof "/" - 1 + strlen(argv0);
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buf = malloc(bufsize);
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if (buf == NULL) return NULL; /* XXX can't happen */
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chptr = NULL;
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/*@-branchstate@*/
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do {
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if ((chptr = strchr(start, ':')))
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*chptr = '\0';
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snprintf(buf, bufsize, "%s/%s", start, argv0);
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if (!access(buf, X_OK))
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return buf;
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if (chptr)
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start = chptr + 1;
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else
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start = NULL;
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} while (start && *start);
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/*@=branchstate@*/
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free(buf);
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return NULL;
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}
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