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| author | Denys Vlasenko <vda.linux@googlemail.com> | 2017-07-14 16:18:16 +0200 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2017-07-14 16:18:16 +0200 |
| commit | 63214a68f1b553e09ae18956cd7e4ec9543535c5 (patch) | |
| tree | 51654d9dfed26a578cf6090193c2cb0333740c8a /libbb/dump.c | |
| parent | 5f7904b6d11355a2010ebd10960d6a5d469301cc (diff) | |
| download | busybox-63214a68f1b553e09ae18956cd7e4ec9543535c5.tar.gz | |
libbb/dump: allow skipping over stdin too
function old new delta
next 294 265 -29
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'libbb/dump.c')
| -rw-r--r-- | libbb/dump.c | 33 |
1 files changed, 13 insertions, 20 deletions
diff --git a/libbb/dump.c b/libbb/dump.c index bc0c1ec80..189277297 100644 --- a/libbb/dump.c +++ b/libbb/dump.c @@ -311,20 +311,18 @@ static NOINLINE void rewrite(priv_dumper_t *dumper, FS *fs) } } -static void do_skip(priv_dumper_t *dumper, const char *fname, int statok) +static void do_skip(priv_dumper_t *dumper, const char *fname) { struct stat sbuf; - if (statok) { - xfstat(STDIN_FILENO, &sbuf, fname); - if (!(S_ISCHR(sbuf.st_mode) || S_ISBLK(sbuf.st_mode) || S_ISFIFO(sbuf.st_mode)) - && dumper->pub.dump_skip >= sbuf.st_size - ) { - /* If st_size is valid and pub.dump_skip >= st_size */ - dumper->pub.dump_skip -= sbuf.st_size; - dumper->address += sbuf.st_size; - return; - } + xfstat(STDIN_FILENO, &sbuf, fname); + if (S_ISREG(sbuf.st_mode) + && dumper->pub.dump_skip >= sbuf.st_size + ) { + /* If st_size is valid and pub.dump_skip >= st_size */ + dumper->pub.dump_skip -= sbuf.st_size; + dumper->address += sbuf.st_size; + return; } if (fseeko(stdin, dumper->pub.dump_skip, SEEK_SET)) { bb_simple_perror_msg_and_die(fname); @@ -336,14 +334,11 @@ static void do_skip(priv_dumper_t *dumper, const char *fname, int statok) static NOINLINE int next(priv_dumper_t *dumper) { - int statok; - for (;;) { - char *fname = *dumper->argv; + const char *fname = *dumper->argv; if (fname) { dumper->argv++; - dumper->next__done = statok = 1; if (!freopen(fname, "r", stdin)) { bb_simple_perror_msg(fname); dumper->exitval = 1; @@ -352,13 +347,11 @@ static NOINLINE int next(priv_dumper_t *dumper) } else { if (dumper->next__done) return 0; /* no next file */ - dumper->next__done = 1; -//why stat of stdin is specially prohibited? - statok = 0; } + dumper->next__done = 1; if (dumper->pub.dump_skip) - do_skip(dumper, statok ? fname : "stdin", statok); - if (!dumper->pub.dump_skip) + do_skip(dumper, fname ? fname : "stdin"); + if (dumper->pub.dump_skip == 0) return 1; } /* NOTREACHED */ |