1 /* $OpenBSD: exec.c,v 1.20 2013/01/08 02:26:09 deraadt Exp $ */
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31 #include <sys/types.h>
44 execvpe(const char *name, char *const *argv, char *const *envp)
51 char *bp, *cur, *path, buf[PATH_MAX];
54 * Do not allow null name
56 if (name == NULL || *name == '\0') {
61 /* If it's an absolute or relative path name, it's easy. */
62 if (strchr(name, '/')) {
69 /* Get the path we're searching. */
70 if (!(path = getenv("PATH")))
72 len = strlen(path) + 1;
78 strlcpy(cur, path, len);
80 while ((p = strsep(&cur, ":"))) {
82 * It's a SHELL path -- double, leading and trailing colons
83 * mean the current directory.
93 * If the path is too long complain. This is a possible
94 * security issue; given a way to make the path too long
95 * the user may execute the wrong program.
97 if (lp + ln + 2 > sizeof(buf)) {
100 iov[0].iov_base = "execvp: ";
104 iov[2].iov_base = ": path too long\n";
106 (void)writev(STDERR_FILENO, iov, 3);
111 bcopy(name, buf + lp + 1, ln);
112 buf[lp + ln + 1] = '\0';
114 retry: (void)execve(bp, argv, envp);
124 for (cnt = 0; argv[cnt]; ++cnt)
126 memp = alloca((cnt + 2) * sizeof(char *));
131 bcopy(argv + 1, memp + 2, cnt * sizeof(char *));
132 (void)execve(_PATH_BSHELL, memp, envp);
140 * We used to retry here, but sh(1) doesn't.