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-rw-r--r--coreutils/tail.c22
1 files changed, 9 insertions, 13 deletions
diff --git a/coreutils/tail.c b/coreutils/tail.c
index 340697f88..52aa8f69e 100644
--- a/coreutils/tail.c
+++ b/coreutils/tail.c
@@ -101,16 +101,12 @@ int tail_main(int argc, char **argv)
#if ENABLE_INCLUDE_SUSv2 || ENABLE_FEATURE_FANCY_TAIL
/* Allow legacy syntax of an initial numeric option without -n. */
- if (argc >= 2 && (argv[1][0] == '+' || argv[1][0] == '-')
+ if (argv[1] && (argv[1][0] == '+' || argv[1][0] == '-')
&& isdigit(argv[1][1])
) {
- /* replacing arg[0] with "-n" can segfault, so... */
- argv[1] = xasprintf("-n%s", argv[1]);
-#if 0 /* If we ever decide to make tail NOFORK */
- char *s = alloca(strlen(argv[1]) + 3);
- sprintf(s, "-n%s", argv[1]);
- argv[1] = s;
-#endif
+ count = eat_num(&argv[1][1]);
+ argv++;
+ argc--;
}
#endif
@@ -133,8 +129,7 @@ int tail_main(int argc, char **argv)
/* open all the files */
fds = xmalloc(sizeof(int) * (argc + 1));
- nfiles = i = 0;
- if (argc == 0) {
+ if (!argv[0]) {
struct stat statbuf;
if (!fstat(STDIN_FILENO, &statbuf) && S_ISFIFO(statbuf.st_mode)) {
@@ -142,13 +137,14 @@ int tail_main(int argc, char **argv)
}
*argv = (char *) bb_msg_standard_input;
}
+ nfiles = i = 0;
do {
- FILE* fil = fopen_or_warn_stdin(argv[i]);
- if (!fil) {
+ int fd = open_or_warn_stdin(argv[i]);
+ if (fd < 0) {
G.status = EXIT_FAILURE;
continue;
}
- fds[nfiles] = fileno(fil);
+ fds[nfiles] = fd;
argv[nfiles++] = argv[i];
} while (++i < argc);