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check before overwriting

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Frédéric Mangano 2013-01-01 17:32:20 +01:00
parent c158a3ed78
commit 48b9e7b931
1 changed files with 19 additions and 7 deletions
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26
opustags.c
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@ -3,6 +3,7 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <ogg/ogg.h>
typedef struct {
@ -151,12 +152,16 @@ int write_page(ogg_page *og, FILE *stream){
int main(int argc, char **argv){
const char *path_in, *path_out = NULL;
int overwrite = 0;
int c;
while((c = getopt(argc, argv, "o:")) != -1){
while((c = getopt(argc, argv, "o:y")) != -1){
switch(c){
case 'o':
path_out = optarg;
break;
case 'y':
overwrite = 1;
break;
default:
return EXIT_FAILURE;
}
@ -166,20 +171,27 @@ int main(int argc, char **argv){
return EXIT_FAILURE;
}
path_in = argv[optind];
FILE *in = fopen(path_in, "r");
if(!in){
perror("fopen");
return EXIT_FAILURE;
}
FILE *out = NULL;
if(path_out != NULL){
if(!overwrite){
if(access(path_out, F_OK) == 0){
fprintf(stderr, "'%s' already exists (use -y to overwrite)\n", path_out);
return EXIT_FAILURE;
}
}
out = fopen(path_out, "w");
if(!out){
perror("fopen");
fclose(in);
return EXIT_FAILURE;
}
}
FILE *in = fopen(path_in, "r");
if(!in){
perror("fopen");
if(out)
fclose(out);
return EXIT_FAILURE;
}
ogg_sync_state oy;
ogg_stream_state os, enc;
ogg_page og;