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Added support for --quiet and --no-warn to xzdec. 

Cleaned up the --help message a little.
This commit is contained in:
Lasse Collin 2009-05-22 16:40:50 +03:00
parent 5f735dae80
commit dcedb6998c
1 changed files with 49 additions and 27 deletions
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74
src/xzdec/xzdec.c
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@ -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)
{
@ -54,8 +76,7 @@ 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
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);
}