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-rw-r--r--coreutils/tail.c47
1 files changed, 21 insertions, 26 deletions
diff --git a/coreutils/tail.c b/coreutils/tail.c
index 52bacb7..67396ab 100644
--- a/coreutils/tail.c
+++ b/coreutils/tail.c
@@ -33,7 +33,10 @@ static const struct suffix_mult tail_suffixes[] = {
{ NULL, 0 }
};
-static int status;
+struct globals {
+ bool status;
+};
+#define G (*(struct globals*)&bb_common_bufsiz1)
static void tail_xprint_header(const char *fmt, const char *filename)
{
@@ -54,7 +57,7 @@ static ssize_t tail_read(int fd, char *buf, size_t count)
r = safe_read(fd, buf, count);
if (r < 0) {
bb_perror_msg(bb_msg_read_error);
- status = EXIT_FAILURE;
+ G.status = EXIT_FAILURE;
}
return r;
@@ -64,7 +67,7 @@ static const char header_fmt[] = "\n==> %s <==\n";
static unsigned eat_num(const char *p) {
if (*p == '-') p++;
- else if (*p == '+') { p++; status = 1; }
+ else if (*p == '+') { p++; G.status = EXIT_FAILURE; }
return xatou_sfx(p, tail_suffixes);
}
@@ -111,11 +114,12 @@ int tail_main(int argc, char **argv)
#endif
argc -= optind;
argv += optind;
- from_top = status;
+ from_top = G.status;
/* open all the files */
fds = xmalloc(sizeof(int) * (argc + 1));
- status = nfiles = i = 0;
+ nfiles = i = 0;
+ G.status = EXIT_SUCCESS;
if (argc == 0) {
struct stat statbuf;
@@ -123,23 +127,15 @@ int tail_main(int argc, char **argv)
opt &= ~1; /* clear FOLLOW */
}
*argv = (char *) bb_msg_standard_input;
- goto DO_STDIN;
}
-
do {
- if (NOT_LONE_DASH(argv[i])) {
- fds[nfiles] = open(argv[i], O_RDONLY);
- if (fds[nfiles] < 0) {
- bb_perror_msg("%s", argv[i]);
- status = EXIT_FAILURE;
- continue;
- }
- } else {
- DO_STDIN: /* "-" */
- fds[nfiles] = STDIN_FILENO;
+ FILE* fil = fopen_or_warn_stdin(argv[i]);
+ if (!fil) {
+ G.status = EXIT_FAILURE;
+ continue;
}
- argv[nfiles] = argv[i];
- ++nfiles;
+ fds[nfiles] = fileno(fil);
+ argv[nfiles++] = argv[i];
} while (++i < argc);
if (!nfiles)
@@ -217,13 +213,11 @@ int tail_main(int argc, char **argv)
if (newline + nbuf < count) {
newline += nbuf;
taillen += nread;
-
} else {
int extra = 0;
- if (buf[nread-1] != '\n') {
- extra = 1;
- }
+ if (buf[nread-1] != '\n')
+ extra = 1;
k = newline + nbuf + extra - count;
s = tailbuf;
while (k) {
@@ -232,7 +226,6 @@ int tail_main(int argc, char **argv)
}
++s;
}
-
taillen += nread - (s - tailbuf);
memmove(tailbuf, s, taillen);
newline = count - extra;
@@ -273,6 +266,8 @@ int tail_main(int argc, char **argv)
}
} while (++i < nfiles);
}
-
- return status;
+ if (ENABLE_FEATURE_CLEAN_UP) {
+ free(fds);
+ }
+ return G.status;
}