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| author | Denys Vlasenko | 2021-06-22 09:23:54 +0200 |
|---|---|---|
| committer | Denys Vlasenko | 2021-06-22 09:29:22 +0200 |
| commit | 836580a7d690dcdade82ce6bdd1f172af1417d0e (patch) | |
| tree | ff6a39fc686fea75a11367520db144bbaedaed14 /coreutils/cksum.c | |
| parent | ea9b96e5aab5a42518041e04b5d2780f6af80c7a (diff) | |
| download | busybox-836580a7d690dcdade82ce6bdd1f172af1417d0e.zip busybox-836580a7d690dcdade82ce6bdd1f172af1417d0e.tar.gz | |
cksum: fix handling of read errors
function old new delta
cksum_main 377 399 +22
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'coreutils/cksum.c')
| -rw-r--r-- | coreutils/cksum.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/coreutils/cksum.c b/coreutils/cksum.c index ecc4385..6b601b7 100644 --- a/coreutils/cksum.c +++ b/coreutils/cksum.c @@ -14,8 +14,9 @@ //config: bool "crc32 (4.1 kb)" //config: default y +// APPLET_NOEXEC:name main location suid_type help //applet:IF_CKSUM(APPLET_NOEXEC(cksum, cksum, BB_DIR_USR_BIN, BB_SUID_DROP, cksum)) -//applet:IF_CKSUM(APPLET_NOEXEC(crc32, cksum, BB_DIR_USR_BIN, BB_SUID_DROP, cksum)) +//applet:IF_CRC32(APPLET_NOEXEC(crc32, cksum, BB_DIR_USR_BIN, BB_SUID_DROP, cksum)) /* bb_common_bufsiz1 usage here is safe wrt NOEXEC: not expecting it to be zeroed. */ //kbuild:lib-$(CONFIG_CKSUM) += cksum.o @@ -31,8 +32,8 @@ /* This is a NOEXEC applet. Be very careful! */ -#define IS_CRC32 (ENABLE_CRC32 && (!ENABLE_CKSUM || applet_name[1] == 'r')) #define IS_CKSUM (ENABLE_CKSUM && (!ENABLE_CRC32 || applet_name[1] == 'k')) +#define IS_CRC32 (ENABLE_CRC32 && (!ENABLE_CKSUM || applet_name[1] == 'r')) int cksum_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int cksum_main(int argc UNUSED_PARAM, char **argv) @@ -51,7 +52,8 @@ int cksum_main(int argc UNUSED_PARAM, char **argv) do { uint32_t crc; off_t filesize; - int fd = open_or_warn_stdin(*argv ? *argv : bb_msg_standard_input); + const char *fname = *argv ? *argv : bb_msg_standard_input; + int fd = open_or_warn_stdin(fname); if (fd < 0) { exit_code = EXIT_FAILURE; @@ -63,6 +65,8 @@ int cksum_main(int argc UNUSED_PARAM, char **argv) #define read_buf bb_common_bufsiz1 for (;;) { int bytes_read = safe_read(fd, read_buf, COMMON_BUFSIZE); + if (bytes_read < 0) + bb_simple_perror_msg_and_die(fname); if (bytes_read > 0) { filesize += bytes_read; } else { |