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Diffstat (limited to 'src/xzdec/xzdec.c')
-rw-r--r--src/xzdec/xzdec.c76
1 files changed, 49 insertions, 27 deletions
diff --git a/src/xzdec/xzdec.c b/src/xzdec/xzdec.c
index 36ff393e..09e8817e 100644
--- a/src/xzdec/xzdec.c
+++ b/src/xzdec/xzdec.c
@@ -13,6 +13,7 @@
#include "sysdefs.h"
#include "lzma.h"
+#include <stdarg.h>
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
@@ -36,10 +37,31 @@
/// Number of bytes to use memory at maximum
static uint64_t memlimit;
+/// Error messages are suppressed if this is zero, which is the case when
+/// --quiet has been given at least twice.
+static unsigned int display_errors = 2;
+
/// Program name to be shown in error messages
static const char *argv0;
+static void lzma_attribute((format(printf, 1, 2)))
+my_errorf(const char *fmt, ...)
+{
+ va_list ap;
+ va_start(ap, fmt);
+
+ if (display_errors) {
+ fprintf(stderr, "%s: ", argv0);
+ vfprintf(stderr, fmt, ap);
+ fprintf(stderr, "\n");
+ }
+
+ va_end(ap);
+ return;
+}
+
+
static void lzma_attribute((noreturn))
my_exit(void)
{
@@ -54,9 +76,8 @@ my_exit(void)
// If it was fclose() that failed, we have the reason
// in errno. If only ferror() indicated an error,
// we have no idea what the reason was.
- fprintf(stderr, "%s: Cannot write to standard output: %s\n",
- argv0, fclose_err
- ? strerror(errno) : "Unknown error");
+ my_errorf("Cannot write to standard output: %s", fclose_err
+ ? strerror(errno) : "Unknown error");
status = EXIT_FAILURE;
}
@@ -77,15 +98,18 @@ help(void)
" -f, --force (ignored)\n"
" -M, --memory=NUM use NUM bytes of memory at maximum (0 means default);\n"
" the suffixes k, M, G, Ki, Mi, and Gi are supported.\n"
+" -q, --quiet specify *twice* to suppress errors\n"
+" -Q, --no-warn (ignored)\n"
" -h, --help display this help and exit\n"
-" -V, --version display version and license information and exit\n"
+" -V, --version display the version number and exit\n"
"\n"
"With no FILE, or when FILE is -, read standard input.\n"
"\n"
"On this system and configuration, this program will use at maximum of roughly\n"
"%" PRIu64 " MiB RAM.\n"
"\n"
-"Report bugs to <" PACKAGE_BUGREPORT "> (in English or Finnish).\n",
+"Report bugs to <" PACKAGE_BUGREPORT "> (in English or Finnish).\n"
+"XZ Utils home page: <http://tukaani.org/xz/>\n",
argv0, memlimit / (1024 * 1024));
my_exit();
}
@@ -133,7 +157,7 @@ str_to_uint64(const char *value)
return UINT64_MAX;
if (*value < '0' || *value > '9') {
- fprintf(stderr, "%s: %s: Not a number\n", argv0, value);
+ my_errorf("%s: Not a number", value);
exit(EXIT_FAILURE);
}
@@ -176,8 +200,7 @@ str_to_uint64(const char *value)
}
if (multiplier == 0) {
- fprintf(stderr, "%s: %s: Invalid suffix\n",
- argv0, value);
+ my_errorf("%s: Invalid suffix", value);
exit(EXIT_FAILURE);
}
@@ -196,7 +219,7 @@ str_to_uint64(const char *value)
static void
parse_options(int argc, char **argv)
{
- static const char short_opts[] = "cdkfM:hV";
+ static const char short_opts[] = "cdkfM:hqQV";
static const struct option long_opts[] = {
{ "stdout", no_argument, NULL, 'c' },
{ "to-stdout", no_argument, NULL, 'c' },
@@ -205,6 +228,8 @@ parse_options(int argc, char **argv)
{ "force", no_argument, NULL, 'f' },
{ "keep", no_argument, NULL, 'k' },
{ "memory", required_argument, NULL, 'M' },
+ { "quiet", no_argument, NULL, 'q' },
+ { "no-warn", no_argument, NULL, 'Q' },
{ "help", no_argument, NULL, 'h' },
{ "version", no_argument, NULL, 'V' },
{ NULL, 0, NULL, 0 }
@@ -219,6 +244,7 @@ parse_options(int argc, char **argv)
case 'd':
case 'f':
case 'k':
+ case 'Q':
break;
case 'M':
@@ -228,6 +254,12 @@ parse_options(int argc, char **argv)
break;
+ case 'q':
+ if (display_errors > 0)
+ --display_errors;
+
+ break;
+
case 'h':
help();
@@ -258,13 +290,8 @@ uncompress(lzma_stream *strm, FILE *file, const char *filename)
// The only reasonable error here is LZMA_MEM_ERROR.
// FIXME: Maybe also LZMA_MEMLIMIT_ERROR in future?
if (ret != LZMA_OK) {
- fprintf(stderr, "%s: ", argv0);
-
- if (ret == LZMA_MEM_ERROR)
- fprintf(stderr, "%s\n", strerror(ENOMEM));
- else
- fprintf(stderr, "Internal program error (bug)\n");
-
+ my_errorf("%s", ret == LZMA_MEM_ERROR ? strerror(ENOMEM)
+ : "Internal program error (bug)");
exit(EXIT_FAILURE);
}
@@ -287,10 +314,8 @@ uncompress(lzma_stream *strm, FILE *file, const char *filename)
// POSIX says that fread() sets errno if
// an error occurred. ferror() doesn't
// touch errno.
- fprintf(stderr, "%s: %s: Error reading "
- "input file: %s\n",
- argv0, filename,
- strerror(errno));
+ my_errorf("%s: Error reading input file: %s",
+ filename, strerror(errno));
exit(EXIT_FAILURE);
}
@@ -315,9 +340,8 @@ uncompress(lzma_stream *strm, FILE *file, const char *filename)
// Wouldn't be a surprise if writing to stderr
// would fail too but at least try to show an
// error message.
- fprintf(stderr, "%s: Cannot write to "
- "standard output: %s\n", argv0,
- strerror(errno));
+ my_errorf("Cannot write to standard output: "
+ "%s", strerror(errno));
exit(EXIT_FAILURE);
}
@@ -378,8 +402,7 @@ uncompress(lzma_stream *strm, FILE *file, const char *filename)
break;
}
- fprintf(stderr, "%s: %s: %s\n", argv0, filename, msg);
-
+ my_errorf("%s: %s", filename, msg);
exit(EXIT_FAILURE);
}
}
@@ -423,8 +446,7 @@ main(int argc, char **argv)
} else {
FILE *file = fopen(argv[optind], "rb");
if (file == NULL) {
- fprintf(stderr, "%s: %s: %s\n",
- argv0, argv[optind],
+ my_errorf("%s: %s", argv[optind],
strerror(errno));
exit(EXIT_FAILURE);
}