diff options
| -rw-r--r-- | pwait.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/pwait.c b/pwait.c index e6fde39..e5f6fde 100644 --- a/pwait.c +++ b/pwait.c @@ -180,7 +180,7 @@ usage: for (n = m = 0; n < argc; n++) { errno = 0; pid = strtol(argv[n], &end, 10); - if (pid < 0 || *end || errno != 0) { + if (pid <= 0 || *end || errno != 0) { fprintf(stderr, "%s: invalid process id\n", argv[n]); continue; } |