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-rw-r--r--toys/pending/gzip.c129
1 files changed, 66 insertions, 63 deletions
diff --git a/toys/pending/gzip.c b/toys/pending/gzip.c
index f7576c66..894a2914 100644
--- a/toys/pending/gzip.c
+++ b/toys/pending/gzip.c
@@ -5,9 +5,9 @@
* GZIP RFC: http://www.ietf.org/rfc/rfc1952.txt
// Existing implementations allow all options for all commands.
-USE_GZIP(NEWTOY(gzip, "cdfk123456789", TOYFLAG_USR|TOYFLAG_BIN))
-USE_GUNZIP(NEWTOY(gunzip, "cdfk123456789", TOYFLAG_USR|TOYFLAG_BIN))
-USE_ZCAT(NEWTOY(zcat, "cdfk123456789", TOYFLAG_USR|TOYFLAG_BIN))
+USE_GZIP(NEWTOY(gzip, "cdfk123456789[-123456789]", TOYFLAG_USR|TOYFLAG_BIN))
+USE_GUNZIP(NEWTOY(gunzip, "cdfk123456789[-123456789]", TOYFLAG_USR|TOYFLAG_BIN))
+USE_ZCAT(NEWTOY(zcat, "cdfk123456789[-123456789]", TOYFLAG_USR|TOYFLAG_BIN))
config GZIP
bool "gzip"
@@ -54,12 +54,12 @@ config ZCAT
-f Force: allow read from tty
*/
-#include <zlib.h>
-
#define FORCE_FLAGS
#define FOR_gzip
#include "toys.h"
+#include <zlib.h>
+
GLOBALS(
int level;
)
@@ -71,65 +71,74 @@ static void fix_time(const char *path, struct stat *sb)
if (utimensat(AT_FDCWD, path, times, 0)) perror_exit("utimensat");
}
-static void gzerror_exit(gzFile f, char *what)
+static void gzerror_msg(gzFile f, char *what)
{
int err;
const char *msg = gzerror(f, &err);
- ((err == Z_ERRNO) ? perror_exit : error_exit)("%s: %s", what, msg);
+ ((err == Z_ERRNO) ? perror_msg : error_msg)("%s: %s", what, msg);
}
-static void do_gunzip(int in_fd, char *arg)
+
+static int zlib_inflate(int in_fd, int out_fd)
{
- struct stat sb;
- int len, both_files;
- char *in_name, *out_name;
+ int len, err = 0;
gzFile in;
- FILE *out;
-
- // "gunzip x.gz" will decompress "x.gz" to "x".
- len = strlen(arg);
- if (len > 3 && !strcmp(arg+len-3, ".gz")) {
- in_name = strdup(arg);
- out_name = strdup(arg);
- out_name[len-3] = '\0';
- } else if (!strcmp(arg, "-")) {
- // "-" means stdin; assume output to stdout.
- // TODO: require -f to read compressed data from tty?
- in_name = strdup("-");
- out_name = strdup("-");
- } else error_exit("unknown suffix: %s", arg);
-
- if (toys.optflags&FLAG_c) {
- free(out_name);
- out_name = strdup("-");
- }
- both_files = strcmp(in_name, "-") && strcmp(out_name, "-");
- if (both_files) xstat(in_name, &sb);
+ if (!(in = gzdopen(in_fd, "r"))) perror_exit("gzdopen");
+ while ((len = gzread(in, toybuf, sizeof(toybuf))) > 0)
+ if (len != writeall(out_fd, toybuf, len)) break;
+ if (len) err = 1;
+ if (len>0) perror_msg("write");
+ if (len<0) gzerror_msg(in, "gzread");
+ if (gzclose(in) != Z_OK) perror_msg("gzclose"), err++;
- in = gzdopen(in_fd, "r");
- if (in == NULL) perror_exit("gzdopen");
- if (!strcmp(out_name, "-")) out = stdout;
- else {
- int out_fd = xcreate(out_name,
- O_CREAT|O_WRONLY|((toys.optflags&FLAG_f)?0:O_EXCL),
- both_files?sb.st_mode:0666);
+ return err;
+}
- out = xfdopen(out_fd, "w");
+static void do_gunzip(int in_fd, char *arg)
+{
+ struct stat sb;
+ int len, out_fd = 0;
+ char *out_name = 0;
+
+ // Are we writing to stderr?
+ if (!in_fd || (toys.optflags&FLAG_c)) out_fd = 1;
+ if (isatty(in_fd)) {
+ if (!(toys.optflags&FLAG_f)) {
+ error_msg("%s:need -f to read TTY"+3*!!in_fd, arg);
+ return;
+ } else out_fd = 1;
}
- while ((len = gzread(in, toybuf, sizeof(toybuf))) > 0) {
- if (fwrite(toybuf, 1, len, out) != (size_t) len) perror_exit("writing");
+ // Are we reading file.gz to write to file?
+ if (!out_fd) {
+ // "gunzip x.gz" will decompress "x.gz" to "x".
+ if ((len = strlen(arg))<4 || strcmp(arg+len-3, ".gz")) {
+ error_msg("no .gz: %s", arg);
+ return;
+ }
+ if (!stat(arg, &sb)) {
+ perror_msg("%s", arg);
+ return;
+ }
+
+ out_name = xstrdup(arg);
+ out_name[len-3] = 0;
+ out_fd = xcreate(out_name,
+ O_CREAT|O_WRONLY|WARN_ONLY|(O_EXCL*!(toys.optflags&FLAG_f)), sb.st_mode);
+ if (out_fd == -1) return;
}
- if (len < 0) gzerror_exit(in, "gzread");
- if (out != stdout && fclose(out)) perror_exit("writing");
- if (gzclose(in) != Z_OK) error_exit("gzclose");
- if (both_files) fix_time(out_name, &sb);
- if (!(toys.optflags&(FLAG_c|FLAG_k))) unlink(in_name);
- free(in_name);
- free(out_name);
+ if (CFG_TOYBOX_LIBZ)
+ if (zlib_inflate(in_fd, out_fd) && out_name) arg = out_name;
+ close(out_fd);
+
+ if (out_name) {
+ fix_time(out_name, &sb);
+ if (!(toys.optflags&FLAG_k)) if (unlink(arg)) perror_msg("unlink %s", arg);
+ free(out_name);
+ }
}
static void do_gzip(int in_fd, char *in_name)
@@ -157,7 +166,10 @@ static void do_gzip(int in_fd, char *in_name)
if (out == NULL) perror_exit("gzdopen %s", out_name);
while ((len = fread(toybuf, 1, sizeof(toybuf), in)) > 0) {
- if (gzwrite(out, toybuf, len) != (int) len) gzerror_exit(out, "gzwrite");
+ if (gzwrite(out, toybuf, len) != (int) len) {
+ gzerror_msg(out, "gzwrite");
+ return;
+ }
}
if (ferror(in)) perror_exit("fread");
if (fclose(in)) perror_exit("fclose");
@@ -168,22 +180,13 @@ static void do_gzip(int in_fd, char *in_name)
free(out_name);
}
-static void do_gz(int fd, char *name)
-{
- if (toys.optflags&FLAG_d) do_gunzip(fd, name);
- else do_gzip(fd, name);
-}
-
void gzip_main(void)
{
- int i = (toys.optflags&0x1ff);
-
- for (TT.level = (i == 0) ? 6 : 10; i; i >>= 1) --TT.level;
-
- // With no arguments, go from stdin to stdout.
- if (!*toys.optargs) toys.optflags |= FLAG_c;
+ for (TT.level = 0; TT.level<9; TT.level++)
+ if ((toys.optflags>>TT.level)&1) break;
+ if (!(TT.level = 9-TT.level)) TT.level = 6;
- loopfiles(toys.optargs, do_gz);
+ loopfiles(toys.optargs, (toys.optflags&FLAG_d) ? do_gunzip : do_gzip);
}
void gunzip_main(void)
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-27 19:26:34 +0000