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Use eprintf() wherever possible, add -h to options

This commit is contained in:
sin 2014-06-04 12:59:45 +01:00
parent 5c66e30060
commit 7fa098ace6
1 changed files with 6 additions and 3 deletions
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9
dd.c
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@ -20,6 +20,7 @@
#include <sys/vfs.h> #include <sys/vfs.h>
#include <time.h> #include <time.h>
#include <unistd.h> #include <unistd.h>
#include "util.h"
struct dd_config { struct dd_config {
const char *in, *out; const char *in, *out;
@ -191,8 +192,7 @@ copy(struct dd_config *ddc)
static void static void
usage(void) usage(void)
{ {
fprintf(stderr, "Usage: odd [if=F1] [of=F2] [bsize] [skip=N] [count=N] [quiet] [nosync]\n"); eprintf("usage: %s [-h] [if=F1] [of=F2] [bsize] [skip=N] [count=N] [quiet] [nosync]\n", argv0);
exit(EXIT_FAILURE);
} }
static void static void
@ -223,6 +223,7 @@ main(int argc, char *argv[])
char buf[1024]; char buf[1024];
struct dd_config config; struct dd_config config;
argv0 = argv[0];
memset(&config, 0, sizeof(config)); memset(&config, 0, sizeof(config));
config.bs = 1<<16; config.bs = 1<<16;
config.in = "/dev/stdin"; config.in = "/dev/stdin";
@ -251,6 +252,8 @@ main(int argc, char *argv[])
config.quiet = 1; config.quiet = 1;
else if (strcmp(argv[i], "nosync") == 0) else if (strcmp(argv[i], "nosync") == 0)
config.nosync = 1; config.nosync = 1;
else if (strcmp(argv[i], "-h") == 0)
usage();
} }
if (!config.in || !config.out) if (!config.in || !config.out)
@ -260,7 +263,7 @@ main(int argc, char *argv[])
signal(SIGINT, sig_int); signal(SIGINT, sig_int);
if (copy(&config) < 0) if (copy(&config) < 0)
fprintf(stderr, "Error: %s\n", strerror(config.saved_errno)); eprintf("copy:");
print_stat(&config); print_stat(&config);
if (config.nosync == 0) if (config.nosync == 0)