catrm

'cat' a file, then optionally 'rm' it. I just felt like writing C.
catrm.zip
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main.c (raw) (1843B)

   1 /**
   2  * catrm, prompt option to cat a file before removing it.
   3 **/
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6 #include <string.h>
   7 #include "fcat.h"
   8 
   9 enum OPTS {
  10 	OPTS_NONE = 0x00,
  11 	OPTS_INTERACTIVE = 0x01
  12 };
  13 
  14 
  15 int prompt(const char *fpath);
  16 int cat(const char *fpath);
  17 int rm(const char *fpath);
  18 void usage(const char *name)
  19 {
  20 	printf("usage: %s [OPTIONS] [FILE]..\n", name);
  21 	puts("");
  22 	puts("prompt the option to remove and/or cat a file.");
  23 	puts("");
  24 	puts("options:");
  25 	puts("\t-ni    non-interactive mode, cat each listed file and remove it.");
  26 	puts("");
  27 	exit(EXIT_SUCCESS);
  28 }
  29 
  30 
  31 int main(int argc, char *argv[])
  32 {
  33 	int opts = OPTS_INTERACTIVE, i;
  34 
  35 	for (i = 1; i < argc; ++i) {
  36 		if (!argv[i] || argv[i][0] != '-') continue;
  37 
  38 		if (strcmp(argv[i], "-h") == 0)
  39 			usage(argv[0]);
  40 		else if (strcmp(argv[i], "-ni") == 0)
  41 			opts &= ~OPTS_INTERACTIVE;
  42 		else
  43 			printf("unrecognised arg: '%s'", argv[i]);
  44 		argv[i] = 0;
  45 	}
  46 
  47 	for (i = 1; i < argc; ++i) {
  48 		if (!(opts & OPTS_INTERACTIVE)) {
  49 			cat(argv[i]);
  50 			rm(argv[i]);
  51 		} else if (prompt(argv[i]) == 'y') {
  52 			rm(argv[i]);
  53 		}
  54 	}
  55 
  56 	return EXIT_SUCCESS;
  57 }
  58 
  59 int prompt(const char *fpath)
  60 {
  61 	int ret = 0;
  62 	char input = 'c';
  63 
  64 	while (ret == 0) {
  65 		printf("remove file '%s' ([y]es/[n]o/[c]at)? ", fpath);
  66 		input = fgetc(stdin);
  67 		
  68 		switch (input) {
  69 			case 'y': ret = 'y'; break;
  70 			case 'n': ret = 'n'; break;
  71 			case 'c': ret = cat(fpath); break;
  72 			default: break;
  73 		}
  74 
  75 		while (fgetc(stdin) != '\n');
  76 	}
  77 
  78 	return ret;
  79 }
  80 
  81 int cat(const char *fpath)
  82 {
  83 	FILE *f = 0;
  84 	int ret = 0;
  85 	
  86 	if (!(f = fopen(fpath, "r"))) {
  87 		perror("failed to open file");
  88 		ret = -1;
  89 	}
  90 	if (fcat(f, stdout) < 0) {
  91 		perror("fcat failed");
  92 		ret = -1;
  93 	}
  94 	fclose(f);
  95 
  96 	return ret;
  97 }
  98 
  99 int rm(const char *fpath)
 100 {
 101 	int ret = 0;
 102 	
 103 	if (remove(fpath) != 0) {
 104 		perror("remove failed");
 105 		ret = -1;
 106 	}
 107 
 108 	return ret;
 109 }