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refuse to read and write to the same file

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Frédéric Mangano 2013-01-01 21:33:46 +01:00
parent 12638bc871
commit 93448fea67
1 changed files with 10 additions and 0 deletions
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10
opustags.c
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@ -1,5 +1,6 @@
#include <errno.h>
#include <getopt.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@ -247,6 +248,15 @@ int main(int argc, char **argv){
return EXIT_FAILURE;
}
path_in = argv[optind];
if(path_out != NULL && strcmp(path_in, "-") != 0){
char canon_in[PATH_MAX+1], canon_out[PATH_MAX+1];
if(realpath(path_in, canon_in) && realpath(path_out, canon_out)){
if(strcmp(canon_in, canon_out) == 0){
fputs("error: the input and output files are the same\n", stderr);
return EXIT_FAILURE;
}
}
}
FILE *out = NULL;
if(path_out != NULL){
if(strcmp(path_out, "-") == 0)