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authorRon Yorston2015-07-31 17:33:24 +0100
committerDenys Vlasenko2015-08-03 16:41:19 +0200
commitb27cf31003774e5aa13491ccb8f1f0721dc5b920 (patch)
treef2b72d7111d1033063524dd411f9e267bcac1ee4 /miscutils/less.c
parentad27a6d3265b2e8a27030a01121afed639bed2da (diff)
downloadbusybox-b27cf31003774e5aa13491ccb8f1f0721dc5b920.zip
busybox-b27cf31003774e5aa13491ccb8f1f0721dc5b920.tar.gz
less: further tweaks to regular file detection
Test explicitly for REOPEN flags: update_num_lines is called unconditionally so (num_lines != NOT_REGULAR_FILE) is also true when num_lines contains a valid number of lines. The call to fstat doesn't need to be in #if ENABLE_FEATURE_LESS_FLAGS: the whole function is already in such a test. Signed-off-by: Ron Yorston <rmy@pobox.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'miscutils/less.c')
-rw-r--r--miscutils/less.c16
1 files changed, 5 insertions, 11 deletions
diff --git a/miscutils/less.c b/miscutils/less.c
index be8d20e..7a441bf 100644
--- a/miscutils/less.c
+++ b/miscutils/less.c
@@ -615,11 +615,12 @@ static int safe_lineno(int fline)
static void update_num_lines(void)
{
int count, fd;
+ struct stat stbuf;
ssize_t len, i;
char buf[4096];
/* only do this for regular files */
- if (num_lines != NOT_REGULAR_FILE) {
+ if (num_lines == REOPEN_AND_COUNT || num_lines == REOPEN_STDIN) {
count = 0;
fd = open("/proc/self/fd/0", O_RDONLY);
if (fd < 0 && num_lines == REOPEN_AND_COUNT) {
@@ -631,17 +632,10 @@ static void update_num_lines(void)
num_lines = NOT_REGULAR_FILE;
return;
}
-#if ENABLE_FEATURE_LESS_FLAGS
- {
- struct stat stbuf;
- if (fstat(fd, &stbuf) != 0
- || !S_ISREG(stbuf.st_mode)
- ) {
- num_lines = NOT_REGULAR_FILE;
- goto do_close;
- }
+ if (fstat(fd, &stbuf) != 0 || !S_ISREG(stbuf.st_mode)) {
+ num_lines = NOT_REGULAR_FILE;
+ goto do_close;
}
-#endif
while ((len = safe_read(fd, buf, sizeof(buf))) > 0) {
for (i = 0; i < len; ++i) {
if (buf[i] == '\n' && ++count == MAXLINES)