diff options
Diffstat (limited to 'src/xzdec/xzdec.c')
| -rw-r--r-- | src/xzdec/xzdec.c | 76 |
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); } |