C Language Error handling strerror
Example
If perror is not flexible enough, you may obtain a user-readable error description by calling strerror from <string.h>.
int main(int argc, char *argv[])
{
FILE *fout;
int last_error = 0;
if ((fout = fopen(argv[1], "w")) == NULL) {
last_error = errno;
/* reset errno and continue */
errno = 0;
}
/* do some processing and try opening the file differently, then */
if (last_error) {
fprintf(stderr, "fopen: Could not open %s for writing: %s",
argv[1], strerror(last_error));
fputs("Cross fingers and continue", stderr);
}
/* do some other processing */
return EXIT_SUCCESS;
}
