Created
July 27, 2020 04:25
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delete files with extension
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/* | |
* gcc del_ext.c -o del_ext -O2 -Wall -s | |
*/ | |
#include <stdio.h> | |
#include <stdarg.h> | |
#include <stdlib.h> | |
#include <string.h> | |
#include <ftw.h> | |
#define DOT '.' | |
static char *ext = NULL; | |
static unsigned long long num_deleted = 0; | |
static unsigned long long num_skipped = 0; | |
static void exit_with_message(int err, const char *message, ...) { | |
va_list va; | |
va_start(va, message); | |
vprintf(message, va); | |
va_end(va); | |
exit(err); | |
} | |
static int remove_ext_cb(const char *fpath, const struct stat *_st, int type, struct FTW *_ftw) { | |
char *tmp; | |
if (type == FTW_F) { | |
if ((tmp = strrchr(fpath, DOT)) && strcmp(tmp, ext) == 0) { | |
num_deleted++; | |
return remove(fpath); | |
} | |
else { | |
num_skipped++; | |
} | |
} | |
return 0; | |
} | |
int main(int argc, char **argv) { | |
printf("welcome\n"); | |
if (argc < 2) { | |
exit_with_message(EXIT_FAILURE, "missing args: location .ext\n"); | |
} | |
if (!(ext = strchr(argv[2], '.')) || strlen(ext) < 2) { | |
exit_with_message(EXIT_FAILURE, "%s is not an extension, eg .json\n", argv[2]); | |
} | |
int ret = nftw(argv[1], remove_ext_cb, 64, FTW_DEPTH | FTW_PHYS); | |
printf("\n---finished---\n\nfiles removed: %llu\nfiles skipped: %llu\nerror code: %d\n", | |
num_deleted, num_skipped, ret); | |
return ret; | |
} |
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