40 lines
1.1 KiB
Diff
40 lines
1.1 KiB
Diff
diff -urN busybox-1.7.2/coreutils/tail.c busybox-1.7.2-tail/coreutils/tail.c
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--- busybox-1.7.2/coreutils/tail.c 2007-09-03 12:48:40.000000000 +0100
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+++ busybox-1.7.2-tail/coreutils/tail.c 2007-10-02 11:16:28.000000000 +0100
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@@ -47,13 +47,16 @@
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static ssize_t tail_read(int fd, char *buf, size_t count)
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{
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ssize_t r;
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- off_t current, end;
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+ off_t current;
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struct stat sbuf;
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- end = current = lseek(fd, 0, SEEK_CUR);
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- if (!fstat(fd, &sbuf))
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- end = sbuf.st_size;
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- lseek(fd, end < current ? 0 : current, SEEK_SET);
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+ /* (A good comment is missing here) */
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+ current = lseek(fd, 0, SEEK_CUR);
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+ /* /proc files report zero st_size, don't lseek them. */
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+ if (fstat(fd, &sbuf) == 0 && sbuf.st_size)
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+ if (sbuf.st_size < current)
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+ lseek(fd, 0, SEEK_SET);
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+
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r = safe_read(fd, buf, count);
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if (r < 0) {
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bb_perror_msg(bb_msg_read_error);
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@@ -67,8 +70,12 @@
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static unsigned eat_num(const char *p)
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{
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- if (*p == '-') p++;
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- else if (*p == '+') { p++; G.status = EXIT_FAILURE; }
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+ if (*p == '-')
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+ p++;
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+ else if (*p == '+') {
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+ p++;
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+ G.status = EXIT_FAILURE;
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+ }
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return xatou_sfx(p, tail_suffixes);
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}
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