libbb: added xfdopen_for_read/write
function old new delta
xfdopen_helper - 40 +40
logdir_open 1163 1184 +21
process_stdin 433 443 +10
xfdopen_for_write - 9 +9
doCommands 2465 2474 +9
patch_main 1214 1222 +8
bbunpack 457 465 +8
xfdopen_for_read - 7 +7
scan_tree 258 262 +4
xstrtoul_range_sfx 230 231 +1
sendmail_main 957 955 -2
passwd_main 1027 1023 -4
parse 969 964 -5
test_main 253 247 -6
sed_main 655 649 -6
dos2unix_main 437 429 -8
fbsplash_main 950 938 -12
handle_dir_common 371 354 -17
expand_vars_to_list 2197 2169 -28
update_passwd 1275 1246 -29
------------------------------------------------------------------------------
(add/remove: 3/0 grow/shrink: 7/10 up/down: 117/-117) Total: 0 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/coreutils/dos2unix.c b/coreutils/dos2unix.c
index 309cbc3..baf879e 100644
--- a/coreutils/dos2unix.c
+++ b/coreutils/dos2unix.c
@@ -42,10 +42,10 @@
i = mkstemp(temp_fn);
if (i == -1
|| fchmod(i, st.st_mode) == -1
- || !(out = fdopen(i, "w+"))
) {
bb_simple_perror_msg_and_die(temp_fn);
}
+ out = xfdopen_for_write(i);
}
while ((i = fgetc(in)) != EOF) {
diff --git a/e2fsprogs/old_e2fsprogs/blkid/read.c b/e2fsprogs/old_e2fsprogs/blkid/read.c
index 67bc8ee..f795a5d 100644
--- a/e2fsprogs/old_e2fsprogs/blkid/read.c
+++ b/e2fsprogs/old_e2fsprogs/blkid/read.c
@@ -374,9 +374,7 @@
DBG(DEBUG_CACHE, printf("reading cache file %s\n",
cache->bic_filename));
- file = fdopen(fd, "r");
- if (!file)
- goto errout;
+ file = xfdopen_for_read(fd);
while (fgets(buf, sizeof(buf), file)) {
blkid_dev dev;
diff --git a/e2fsprogs/old_e2fsprogs/blkid/save.c b/e2fsprogs/old_e2fsprogs/blkid/save.c
index 3600260..e60cca4 100644
--- a/e2fsprogs/old_e2fsprogs/blkid/save.c
+++ b/e2fsprogs/old_e2fsprogs/blkid/save.c
@@ -95,7 +95,7 @@
sprintf(tmp, "%s-XXXXXX", filename);
fd = mkstemp(tmp);
if (fd >= 0) {
- file = fdopen(fd, "w");
+ file = xfdopen_for_write(fd);
opened = tmp;
}
fchmod(fd, 0644);
diff --git a/editors/sed.c b/editors/sed.c
index c1ee750..19e7683 100644
--- a/editors/sed.c
+++ b/editors/sed.c
@@ -1338,7 +1338,7 @@
nonstdoutfd = mkstemp(G.outname);
if (-1 == nonstdoutfd)
bb_perror_msg_and_die("can't create temp file %s", G.outname);
- G.nonstdout = fdopen(nonstdoutfd, "w");
+ G.nonstdout = xfdopen_for_write(nonstdoutfd);
/* Set permissions/owner of output file */
fstat(fileno(file), &statbuf);
diff --git a/include/libbb.h b/include/libbb.h
index 89d7a7b..d95be5c 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -658,21 +658,23 @@
/* Same, but doesn't try to conserve space (may have some slack after the end) */
/* extern char *xmalloc_fgetline_fast(FILE *file) FAST_FUNC RETURNS_MALLOC; */
-extern void die_if_ferror(FILE *file, const char *msg) FAST_FUNC;
-extern void die_if_ferror_stdout(void) FAST_FUNC;
-extern int fflush_all(void) FAST_FUNC;
-extern void fflush_stdout_and_exit(int retval) NORETURN FAST_FUNC;
-extern int fclose_if_not_stdin(FILE *file) FAST_FUNC;
-extern FILE *xfopen(const char *filename, const char *mode) FAST_FUNC;
+void die_if_ferror(FILE *file, const char *msg) FAST_FUNC;
+void die_if_ferror_stdout(void) FAST_FUNC;
+int fflush_all(void) FAST_FUNC;
+void fflush_stdout_and_exit(int retval) NORETURN FAST_FUNC;
+int fclose_if_not_stdin(FILE *file) FAST_FUNC;
+FILE* xfopen(const char *filename, const char *mode) FAST_FUNC;
/* Prints warning to stderr and returns NULL on failure: */
-extern FILE *fopen_or_warn(const char *filename, const char *mode) FAST_FUNC;
+FILE* fopen_or_warn(const char *filename, const char *mode) FAST_FUNC;
/* "Opens" stdin if filename is special, else just opens file: */
-extern FILE *xfopen_stdin(const char *filename) FAST_FUNC;
-extern FILE *fopen_or_warn_stdin(const char *filename) FAST_FUNC;
-extern FILE* fopen_for_read(const char *path) FAST_FUNC;
-extern FILE* xfopen_for_read(const char *path) FAST_FUNC;
-extern FILE* fopen_for_write(const char *path) FAST_FUNC;
-extern FILE* xfopen_for_write(const char *path) FAST_FUNC;
+FILE* xfopen_stdin(const char *filename) FAST_FUNC;
+FILE* fopen_or_warn_stdin(const char *filename) FAST_FUNC;
+FILE* fopen_for_read(const char *path) FAST_FUNC;
+FILE* xfopen_for_read(const char *path) FAST_FUNC;
+FILE* fopen_for_write(const char *path) FAST_FUNC;
+FILE* xfopen_for_write(const char *path) FAST_FUNC;
+FILE* xfdopen_for_read(int fd) FAST_FUNC;
+FILE* xfdopen_for_write(int fd) FAST_FUNC;
int bb_pstrcmp(const void *a, const void *b) /* not FAST_FUNC! */;
void qsort_string_vector(char **sv, unsigned count) FAST_FUNC;
diff --git a/libbb/update_passwd.c b/libbb/update_passwd.c
index ba773fc..301893b 100644
--- a/libbb/update_passwd.c
+++ b/libbb/update_passwd.c
@@ -137,12 +137,7 @@
fchown(new_fd, sb.st_uid, sb.st_gid);
}
errno = 0;
- new_fp = fdopen(new_fd, "w");
- if (!new_fp) {
- bb_perror_nomsg();
- close(new_fd);
- goto unlink_new;
- }
+ new_fp = xfdopen_for_write(new_fd);
/* Backup file is "/etc/passwd-" */
*sfx_char = '-';
diff --git a/libbb/wfopen.c b/libbb/wfopen.c
index 1cb871e..deec79a 100644
--- a/libbb/wfopen.c
+++ b/libbb/wfopen.c
@@ -38,3 +38,19 @@
{
return xfopen(path, "w");
}
+
+static FILE* xfdopen_helper(unsigned fd_and_rw_bit)
+{
+ FILE* fp = fdopen(fd_and_rw_bit >> 1, fd_and_rw_bit & 1 ? "w" : "r");
+ if (!fp)
+ bb_error_msg_and_die(bb_msg_memory_exhausted);
+ return fp;
+}
+FILE* FAST_FUNC xfdopen_for_read(int fd)
+{
+ return xfdopen_helper(fd << 1);
+}
+FILE* FAST_FUNC xfdopen_for_write(int fd)
+{
+ return xfdopen_helper((fd << 1) + 1);
+}
diff --git a/mailutils/mime.c b/mailutils/mime.c
index dd81139..17d0f9d 100644
--- a/mailutils/mime.c
+++ b/mailutils/mime.c
@@ -293,7 +293,7 @@
}
// parent dumps to fd[1]
close(fd[0]);
- fp = fdopen(fd[1], "w");
+ fp = xfdopen_for_write(fd[1]);
signal(SIGPIPE, SIG_IGN); // ignore EPIPE
// or create a file for dump
} else {
diff --git a/mailutils/sendmail.c b/mailutils/sendmail.c
index 2f99df6..4b58a78 100644
--- a/mailutils/sendmail.c
+++ b/mailutils/sendmail.c
@@ -93,7 +93,7 @@
// save initial stdin since body is piped!
xdup2(STDIN_FILENO, 3);
- G.fp0 = fdopen(3, "r");
+ G.fp0 = xfdopen_for_read(3);
// parse options
// -f is required. -H and -S are mutually exclusive
diff --git a/miscutils/fbsplash.c b/miscutils/fbsplash.c
index 0afd189..4560bb2 100644
--- a/miscutils/fbsplash.c
+++ b/miscutils/fbsplash.c
@@ -227,7 +227,7 @@
int fd = open_zipped(G.image_filename);
if (fd < 0)
bb_simple_perror_msg_and_die(G.image_filename);
- theme_file = fdopen(fd, "r");
+ theme_file = xfdopen_for_read(fd);
}
head = xmalloc(256);
diff --git a/modutils/modprobe-small.c b/modutils/modprobe-small.c
index 8ef9101..53b7c94 100644
--- a/modutils/modprobe-small.c
+++ b/modutils/modprobe-small.c
@@ -384,11 +384,7 @@
FILE *fp;
/* We want good error reporting. fdprintf is not good enough. */
- fp = fdopen(fd, "w");
- if (!fp) {
- close(fd);
- goto err;
- }
+ fp = xfdopen_for_write(fd);
i = 0;
while (modinfo[i].pathname) {
fprintf(fp, "%s%s%s\n" "%s%s\n",
diff --git a/networking/ftpd.c b/networking/ftpd.c
index 9937cc3..df8188c 100644
--- a/networking/ftpd.c
+++ b/networking/ftpd.c
@@ -691,9 +691,7 @@
/* -n prevents user/groupname display,
* which can be problematic in chroot */
ls_fd = popen_ls((opts & LONG_LISTING) ? "-l" : "-1");
- ls_fp = fdopen(ls_fd, "r");
- if (!ls_fp) /* never happens. paranoia */
- bb_perror_msg_and_die("fdopen");
+ ls_fp = xfdopen_for_read(ls_fd);
if (opts & USE_CTRL_CONN) {
/* STAT <filename> */
diff --git a/networking/ifupdown.c b/networking/ifupdown.c
index 88d1944..b16186e 100644
--- a/networking/ifupdown.c
+++ b/networking/ifupdown.c
@@ -1056,8 +1056,8 @@
/* parent */
close(infd.rd);
close(outfd.wr);
- *in = fdopen(infd.wr, "w");
- *out = fdopen(outfd.rd, "r");
+ *in = xfdopen_for_write(infd.wr);
+ *out = xfdopen_for_read(outfd.rd);
return pid;
}
diff --git a/runit/svlogd.c b/runit/svlogd.c
index 9a00fad..fe40cd8 100644
--- a/runit/svlogd.c
+++ b/runit/svlogd.c
@@ -761,8 +761,8 @@
}
while ((ld->fdcur = open("current", O_WRONLY|O_NDELAY|O_APPEND|O_CREAT, 0600)) == -1)
pause2cannot("open current", ld->name);
- /* we presume this cannot fail */
- ld->filecur = fdopen(ld->fdcur, "a"); ////
+ while ((ld->filecur = fdopen(ld->fdcur, "a")) == NULL)
+ pause2cannot("open current", ld->name); ////
setvbuf(ld->filecur, NULL, _IOFBF, linelen); ////
close_on_exec_on(ld->fdcur);
diff --git a/shell/hush.c b/shell/hush.c
index 6f394d1..ede8d68 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -5301,25 +5301,22 @@
free(to_free);
# endif
close(channel[1]);
-//TODO: libbb: fdopen_or_die?
- return fdopen(channel[0], "r");
+ close_on_exec_on(channel[0]);
+ return xfdopen_for_read(channel[0]);
}
/* Return code is exit status of the process that is run. */
static int process_command_subs(o_string *dest, const char *s)
{
- FILE *pf;
+ FILE *fp;
struct in_str pipe_str;
pid_t pid;
int status, ch, eol_cnt;
- pf = generate_stream_from_string(s, &pid);
- if (pf == NULL)
- return 1;
- close_on_exec_on(fileno(pf));
+ fp = generate_stream_from_string(s, &pid);
/* Now send results of command back into original context */
- setup_file_in_str(&pipe_str, pf);
+ setup_file_in_str(&pipe_str, fp);
eol_cnt = 0;
while ((ch = i_getch(&pipe_str)) != EOF) {
if (ch == '\n') {
@@ -5334,7 +5331,7 @@
}
debug_printf("done reading from `cmd` pipe, closing it\n");
- fclose(pf);
+ fclose(fp);
/* We need to extract exitcode. Test case
* "true; echo `sleep 1; false` $?"
* should print 1 */