vapier | b56735e | 2006-08-21 07:05:41 +0000 | [diff] [blame] | 1 | /* -*- mode: C; c-basic-offset: 4; indent-tabs-mode: t -*- */ |
vapier | 45a8ba0 | 2009-07-20 10:59:32 +0000 | [diff] [blame] | 2 | /* |
vapier | b56735e | 2006-08-21 07:05:41 +0000 | [diff] [blame] | 3 | * self_exec.c: self_exec magic required to run child functions on uClinux |
vapier | 45a8ba0 | 2009-07-20 10:59:32 +0000 | [diff] [blame] | 4 | * |
vapier | b56735e | 2006-08-21 07:05:41 +0000 | [diff] [blame] | 5 | * Copyright (C) 2005 Paul J.Y. Lahaie <pjlahaie-at-steamballoon.com> |
vapier | 45a8ba0 | 2009-07-20 10:59:32 +0000 | [diff] [blame] | 6 | * |
vapier | b56735e | 2006-08-21 07:05:41 +0000 | [diff] [blame] | 7 | * This program is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU General Public License |
| 9 | * as published by the Free Software Foundation; either version 2 |
| 10 | * of the License, or (at your option) any later version. |
vapier | 45a8ba0 | 2009-07-20 10:59:32 +0000 | [diff] [blame] | 11 | * |
vapier | b56735e | 2006-08-21 07:05:41 +0000 | [diff] [blame] | 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
vapier | 45a8ba0 | 2009-07-20 10:59:32 +0000 | [diff] [blame] | 16 | * |
vapier | b56735e | 2006-08-21 07:05:41 +0000 | [diff] [blame] | 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
vapier | 45a8ba0 | 2009-07-20 10:59:32 +0000 | [diff] [blame] | 20 | * |
vapier | b56735e | 2006-08-21 07:05:41 +0000 | [diff] [blame] | 21 | * This software was produced by Steamballoon Incorporated |
| 22 | * 55 Byward Market Square, 2nd Floor North, Ottawa, ON K1N 9C3, Canada |
| 23 | */ |
| 24 | |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 25 | #define _GNU_SOURCE /* for asprintf */ |
Mike Frysinger | 28606c1 | 2010-08-17 17:22:45 -0400 | [diff] [blame] | 26 | |
| 27 | #include "config.h" |
| 28 | |
vapier | b56735e | 2006-08-21 07:05:41 +0000 | [diff] [blame] | 29 | #ifdef UCLINUX |
| 30 | |
vapier | b56735e | 2006-08-21 07:05:41 +0000 | [diff] [blame] | 31 | #include <stdarg.h> |
| 32 | #include <string.h> |
| 33 | #include <stdio.h> |
| 34 | #include "test.h" |
| 35 | |
| 36 | /* Set from parse_opts.c: */ |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 37 | char *child_args; /* Arguments to child when -C is used */ |
vapier | b56735e | 2006-08-21 07:05:41 +0000 | [diff] [blame] | 38 | |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 39 | static char *start_cwd; /* Stores the starting directory for self_exec */ |
vapier | b56735e | 2006-08-21 07:05:41 +0000 | [diff] [blame] | 40 | |
| 41 | int asprintf(char **app, const char *fmt, ...) |
| 42 | { |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 43 | va_list ptr; |
| 44 | int rv; |
| 45 | char *p; |
vapier | b56735e | 2006-08-21 07:05:41 +0000 | [diff] [blame] | 46 | |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 47 | /* |
| 48 | * First iteration - find out size of buffer required and allocate it. |
| 49 | */ |
| 50 | va_start(ptr, fmt); |
| 51 | rv = vsnprintf(NULL, 0, fmt, ptr); |
| 52 | va_end(ptr); |
vapier | b56735e | 2006-08-21 07:05:41 +0000 | [diff] [blame] | 53 | |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 54 | p = malloc(++rv); /* allocate the buffer */ |
| 55 | *app = p; |
| 56 | if (!p) { |
| 57 | return -1; |
| 58 | } |
vapier | b56735e | 2006-08-21 07:05:41 +0000 | [diff] [blame] | 59 | |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 60 | /* |
| 61 | * Second iteration - actually produce output. |
| 62 | */ |
| 63 | va_start(ptr, fmt); |
| 64 | rv = vsnprintf(p, rv, fmt, ptr); |
| 65 | va_end(ptr); |
vapier | b56735e | 2006-08-21 07:05:41 +0000 | [diff] [blame] | 66 | |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 67 | return rv; |
vapier | b56735e | 2006-08-21 07:05:41 +0000 | [diff] [blame] | 68 | } |
| 69 | |
Mike Frysinger | 55d8ae5 | 2014-02-13 04:11:45 -0500 | [diff] [blame] | 70 | void maybe_run_child(void (*child) (), const char *fmt, ...) |
vapier | b56735e | 2006-08-21 07:05:41 +0000 | [diff] [blame] | 71 | { |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 72 | va_list ap; |
| 73 | char *child_dir; |
| 74 | char *p, *tok; |
| 75 | int *iptr, i, j; |
| 76 | char *s; |
| 77 | char **sptr; |
| 78 | char *endptr; |
vapier | b56735e | 2006-08-21 07:05:41 +0000 | [diff] [blame] | 79 | |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 80 | /* Store the current directory for later use. */ |
| 81 | start_cwd = getcwd(NULL, 0); |
vapier | b56735e | 2006-08-21 07:05:41 +0000 | [diff] [blame] | 82 | |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 83 | if (child_args) { |
| 84 | char *args = strdup(child_args); |
vapier | b56735e | 2006-08-21 07:05:41 +0000 | [diff] [blame] | 85 | |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 86 | child_dir = strtok(args, ","); |
| 87 | if (strlen(child_dir) == 0) { |
| 88 | tst_brkm(TBROK, NULL, |
| 89 | "Could not get directory from -C option"); |
Cyril Hrubis | d101cab | 2017-02-14 11:48:46 +0100 | [diff] [blame] | 90 | return; |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 91 | } |
| 92 | |
| 93 | va_start(ap, fmt); |
| 94 | |
| 95 | for (p = fmt; *p; p++) { |
| 96 | tok = strtok(NULL, ","); |
| 97 | if (!tok || strlen(tok) == 0) { |
| 98 | tst_brkm(TBROK, NULL, |
| 99 | "Invalid argument to -C option"); |
Cyril Hrubis | d101cab | 2017-02-14 11:48:46 +0100 | [diff] [blame] | 100 | return; |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 101 | } |
| 102 | |
| 103 | switch (*p) { |
| 104 | case 'd': |
| 105 | iptr = va_arg(ap, int *); |
| 106 | i = strtol(tok, &endptr, 10); |
| 107 | if (*endptr != '\0') { |
| 108 | tst_brkm(TBROK, NULL, |
| 109 | "Invalid argument to -C option"); |
Cyril Hrubis | d101cab | 2017-02-14 11:48:46 +0100 | [diff] [blame] | 110 | return; |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 111 | } |
| 112 | *iptr = i; |
| 113 | break; |
| 114 | case 'n': |
| 115 | j = va_arg(ap, int); |
| 116 | i = strtol(tok, &endptr, 10); |
| 117 | if (*endptr != '\0') { |
| 118 | tst_brkm(TBROK, NULL, |
| 119 | "Invalid argument to -C option"); |
Cyril Hrubis | d101cab | 2017-02-14 11:48:46 +0100 | [diff] [blame] | 120 | return; |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 121 | } |
| 122 | if (j != i) { |
| 123 | va_end(ap); |
Manjeet Pawar | c414040 | 2015-05-28 04:41:36 +0000 | [diff] [blame] | 124 | free(args); |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 125 | return; |
| 126 | } |
| 127 | break; |
| 128 | case 's': |
| 129 | s = va_arg(ap, char *); |
| 130 | if (!strncpy(s, tok, strlen(tok) + 1)) { |
| 131 | tst_brkm(TBROK, NULL, |
| 132 | "Could not strncpy for -C option"); |
Cyril Hrubis | d101cab | 2017-02-14 11:48:46 +0100 | [diff] [blame] | 133 | return; |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 134 | } |
| 135 | break; |
| 136 | case 'S': |
| 137 | sptr = va_arg(ap, char **); |
| 138 | *sptr = strdup(tok); |
| 139 | if (!*sptr) { |
| 140 | tst_brkm(TBROK, NULL, |
| 141 | "Could not strdup for -C option"); |
Cyril Hrubis | d101cab | 2017-02-14 11:48:46 +0100 | [diff] [blame] | 142 | return; |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 143 | } |
| 144 | break; |
| 145 | default: |
| 146 | tst_brkm(TBROK, NULL, |
| 147 | "Format string option %c not implemented", |
| 148 | *p); |
Cyril Hrubis | d101cab | 2017-02-14 11:48:46 +0100 | [diff] [blame] | 149 | return; |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 150 | } |
| 151 | } |
| 152 | |
| 153 | va_end(ap); |
Manjeet Pawar | c414040 | 2015-05-28 04:41:36 +0000 | [diff] [blame] | 154 | free(args); |
Cyril Hrubis | d101cab | 2017-02-14 11:48:46 +0100 | [diff] [blame] | 155 | if (chdir(child_dir) < 0) { |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 156 | tst_brkm(TBROK, NULL, |
| 157 | "Could not change to %s for child", child_dir); |
Cyril Hrubis | d101cab | 2017-02-14 11:48:46 +0100 | [diff] [blame] | 158 | return; |
| 159 | } |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 160 | |
| 161 | (*child) (); |
| 162 | tst_resm(TWARN, "Child function returned unexpectedly"); |
| 163 | /* Exit here? or exit silently? */ |
| 164 | } |
| 165 | } |
| 166 | |
Mike Frysinger | 55d8ae5 | 2014-02-13 04:11:45 -0500 | [diff] [blame] | 167 | int self_exec(const char *argv0, const char *fmt, ...) |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 168 | { |
| 169 | va_list ap; |
| 170 | char *p; |
| 171 | char *tmp_cwd; |
| 172 | char *arg; |
| 173 | int ival; |
| 174 | char *str; |
| 175 | |
| 176 | if ((tmp_cwd = getcwd(NULL, 0)) == NULL) { |
| 177 | tst_resm(TBROK, "Could not getcwd()"); |
| 178 | return -1; |
| 179 | } |
| 180 | |
| 181 | arg = strdup(tmp_cwd); |
Manjeet Pawar | c414040 | 2015-05-28 04:41:36 +0000 | [diff] [blame] | 182 | if (arg == NULL) { |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 183 | tst_resm(TBROK, "Could not produce self_exec string"); |
| 184 | return -1; |
vapier | b56735e | 2006-08-21 07:05:41 +0000 | [diff] [blame] | 185 | } |
| 186 | |
| 187 | va_start(ap, fmt); |
| 188 | |
| 189 | for (p = fmt; *p; p++) { |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 190 | switch (*p) { |
| 191 | case 'd': |
| 192 | case 'n': |
| 193 | ival = va_arg(ap, int); |
| 194 | if (asprintf(&arg, "%s,%d", arg, ival) < 0) { |
| 195 | tst_resm(TBROK, |
| 196 | "Could not produce self_exec string"); |
| 197 | return -1; |
| 198 | } |
| 199 | break; |
| 200 | case 's': |
| 201 | case 'S': |
| 202 | str = va_arg(ap, char *); |
| 203 | if (asprintf(&arg, "%s,%s", arg, str) < 0) { |
| 204 | tst_resm(TBROK, |
| 205 | "Could not produce self_exec string"); |
| 206 | return -1; |
| 207 | } |
| 208 | break; |
| 209 | default: |
| 210 | tst_resm(TBROK, |
| 211 | "Format string option %c not implemented", *p); |
| 212 | return -1; |
| 213 | break; |
vapier | b56735e | 2006-08-21 07:05:41 +0000 | [diff] [blame] | 214 | } |
vapier | b56735e | 2006-08-21 07:05:41 +0000 | [diff] [blame] | 215 | } |
| 216 | |
| 217 | va_end(ap); |
| 218 | |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 219 | if (chdir(start_cwd) < 0) { |
| 220 | tst_resm(TBROK, "Could not change to %s for self_exec", |
| 221 | start_cwd); |
vapier | b56735e | 2006-08-21 07:05:41 +0000 | [diff] [blame] | 222 | return -1; |
vapier | b56735e | 2006-08-21 07:05:41 +0000 | [diff] [blame] | 223 | } |
vapier | b56735e | 2006-08-21 07:05:41 +0000 | [diff] [blame] | 224 | |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 225 | return execlp(argv0, argv0, "-C", arg, (char *)NULL); |
vapier | b56735e | 2006-08-21 07:05:41 +0000 | [diff] [blame] | 226 | } |
| 227 | |
Markos Chandras | 8d2d8ba | 2012-01-03 10:40:50 +0000 | [diff] [blame] | 228 | #endif /* UCLINUX */ |