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| 1 | /* |
| 2 | * run.c - Run helper scripts |
| 3 | * |
| 4 | * Copyright 2012 by Werner Almesberger |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | */ |
| 11 | |
| 12 | #define _GNU_SOURCE /* for vasprintf */ |
| 13 | #include <stdarg.h> |
| 14 | #include <stdlib.h> |
| 15 | #include <stdio.h> |
| 16 | #include <sys/types.h> |
| 17 | |
| 18 | #include "run.h" |
| 19 | |
| 20 | |
| 21 | void run_cmd(const char *fmt, ...) |
| 22 | { |
| 23 | va_list ap; |
| 24 | char *tmp; |
| 25 | int res; |
| 26 | |
| 27 | va_start(ap, fmt); |
| 28 | if (vasprintf(&tmp, fmt, ap) < 0) { |
| 29 | perror("vasprintf"); |
| 30 | exit(1); |
| 31 | } |
| 32 | res = system(tmp); |
| 33 | if (res < 0) { |
| 34 | perror("system"); |
| 35 | exit(1); |
| 36 | } |
| 37 | if (res) { |
| 38 | fprintf(stderr, "\"%s\" returned %d\n", tmp, res); |
| 39 | exit(1); |
| 40 | } |
| 41 | } |
| 42 | |
| 43 | |
| 44 | void cat(FILE *out, const char *name) |
| 45 | { |
| 46 | FILE *in; |
| 47 | char buf[10000]; /* pick any good size */ |
| 48 | size_t got, wrote; |
| 49 | |
| 50 | in = fopen(name, "r"); |
| 51 | if (!in) { |
| 52 | perror(name); |
| 53 | exit(1); |
| 54 | } |
| 55 | while (1) { |
| 56 | got = fread(buf, 1, sizeof(buf), in); |
| 57 | if (!got) |
| 58 | break; |
| 59 | wrote = fwrite(buf, 1, got, out); |
| 60 | if (wrote != got) { |
| 61 | perror("fwrite"); |
| 62 | exit(1); |
| 63 | } |
| 64 | } |
| 65 | if (ferror(in)) { |
| 66 | perror(name); |
| 67 | exit(1); |
| 68 | } |
| 69 | fclose(in); |
| 70 | } |
| 71 |
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