-/* (C) 1998 Red Hat Software, Inc. -- Licensing details are in the COPYING
+/** \ingroup popt
+ * \file popt/findme.c
+ */
+
+/* (C) 1998-2002 Red Hat, Inc. -- Licensing details are in the COPYING
file accompanying popt source distributions, available from
- ftp://ftp.redhat.com/pub/code/popt */
+ ftp://ftp.rpm.org/pub/rpm/dist. */
#include "system.h"
#include "findme.h"
-const char * findProgramPath(const char * argv0) {
+const char * findProgramPath(const char * argv0)
+{
char * path = getenv("PATH");
char * pathbuf;
char * start, * chptr;
char * buf;
+ size_t bufsize;
- /* If there is a / in the argv[0], it has to be an absolute
- path */
+ if (argv0 == NULL) return NULL; /* XXX can't happen */
+ /* If there is a / in the argv[0], it has to be an absolute path */
if (strchr(argv0, '/'))
return xstrdup(argv0);
- if (!path) return NULL;
+ if (path == NULL) return NULL;
- start = pathbuf = alloca(strlen(path) + 1);
- buf = malloc(strlen(path) + strlen(argv0) + 2);
- strcpy(pathbuf, path);
+ bufsize = strlen(path) + 1;
+ start = pathbuf = alloca(bufsize);
+ if (pathbuf == NULL) return NULL; /* XXX can't happen */
+ strlcpy(pathbuf, path, bufsize);
+ bufsize += sizeof "/" - 1 + strlen(argv0);
+ buf = malloc(bufsize);
+ if (buf == NULL) return NULL; /* XXX can't happen */
chptr = NULL;
+ /*@-branchstate@*/
do {
if ((chptr = strchr(start, ':')))
*chptr = '\0';
- sprintf(buf, "%s/%s", start, argv0);
+ snprintf(buf, bufsize, "%s/%s", start, argv0);
if (!access(buf, X_OK))
return buf;
else
start = NULL;
} while (start && *start);
+ /*@=branchstate@*/
free(buf);