Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1 | /* vi: set sw=4 ts=4: */ |
| 2 | /* |
| 3 | * BusyBox Shell |
| 4 | * |
| 5 | * Copyright (C) 2000 by Lineo, inc. |
| 6 | * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org> |
| 7 | * |
| 8 | * Based in part on ladsh.c by Michael K. Johnson and Erik W. Troan, which is |
| 9 | * under the following liberal license: "We have placed this source code in the |
| 10 | * public domain. Use it in any project, free or commercial." |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or modify |
| 13 | * it under the terms of the GNU General Public License as published by |
| 14 | * the Free Software Foundation; either version 2 of the License, or |
| 15 | * (at your option) any later version. |
| 16 | * |
| 17 | * This program is distributed in the hope that it will be useful, |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 20 | * General Public License for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU General Public License |
| 23 | * along with this program; if not, write to the Free Software |
| 24 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 25 | * |
| 26 | */ |
| 27 | |
| 28 | #include "internal.h" |
| 29 | #include <stdio.h> |
| 30 | #include <stdlib.h> |
| 31 | #include <ctype.h> |
| 32 | #include <errno.h> |
| 33 | #include <fcntl.h> |
| 34 | #include <glob.h> |
| 35 | #include <signal.h> |
| 36 | #include <string.h> |
| 37 | #include <sys/ioctl.h> |
| 38 | #include <sys/wait.h> |
| 39 | #include <unistd.h> |
| 40 | |
| 41 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 42 | #ifdef BB_FEATURE_SH_COMMAND_EDITING |
| 43 | #include "cmdedit.h" |
| 44 | #endif |
| 45 | |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 46 | #define JOB_STATUS_FORMAT "[%d] %-22s %.40s\n" |
| 47 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 48 | |
| 49 | enum redirectionType { REDIRECT_INPUT, REDIRECT_OVERWRITE, |
| 50 | REDIRECT_APPEND }; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 51 | |
| 52 | struct jobSet { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 53 | struct job *head; /* head of list of running jobs */ |
| 54 | struct job *fg; /* current foreground job */ |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 55 | }; |
| 56 | |
| 57 | struct redirectionSpecifier { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 58 | enum redirectionType type; /* type of redirection */ |
| 59 | int fd; /* file descriptor being redirected */ |
| 60 | char *filename; /* file to redirect fd to */ |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 61 | }; |
| 62 | |
| 63 | struct childProgram { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 64 | pid_t pid; /* 0 if exited */ |
| 65 | char **argv; /* program name and arguments */ |
| 66 | int numRedirections; /* elements in redirection array */ |
| 67 | struct redirectionSpecifier *redirections; /* I/O redirections */ |
| 68 | glob_t globResult; /* result of parameter globbing */ |
| 69 | int freeGlob; /* should we globfree(&globResult)? */ |
| 70 | int isStopped; /* is the program currently running? */ |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 71 | }; |
| 72 | |
| 73 | struct job { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 74 | int jobId; /* job number */ |
| 75 | int numProgs; /* total number of programs in job */ |
| 76 | int runningProgs; /* number of programs running */ |
| 77 | char *text; /* name of job */ |
| 78 | char *cmdBuf; /* buffer various argv's point into */ |
| 79 | pid_t pgrp; /* process group ID for the job */ |
| 80 | struct childProgram *progs; /* array of programs in job */ |
| 81 | struct job *next; /* to track background commands */ |
| 82 | int stoppedProgs; /* number of programs alive, but stopped */ |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 83 | }; |
| 84 | |
| 85 | struct builtInCommand { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 86 | char *cmd; /* name */ |
| 87 | char *descr; /* description */ |
| 88 | char *usage; /* usage */ |
| 89 | int (*function) (struct job *, struct jobSet * jobList); /* function ptr */ |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 90 | }; |
| 91 | |
| 92 | /* Some function prototypes */ |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 93 | static int shell_cd(struct job *cmd, struct jobSet *junk); |
| 94 | static int shell_env(struct job *dummy, struct jobSet *junk); |
| 95 | static int shell_exit(struct job *cmd, struct jobSet *junk); |
| 96 | static int shell_fg_bg(struct job *cmd, struct jobSet *jobList); |
| 97 | static int shell_help(struct job *cmd, struct jobSet *junk); |
| 98 | static int shell_jobs(struct job *dummy, struct jobSet *jobList); |
| 99 | static int shell_pwd(struct job *dummy, struct jobSet *junk); |
| 100 | static int shell_set(struct job *cmd, struct jobSet *junk); |
| 101 | static int shell_source(struct job *cmd, struct jobSet *jobList); |
| 102 | static int shell_unset(struct job *cmd, struct jobSet *junk); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 103 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 104 | static void checkJobs(struct jobSet *jobList); |
| 105 | static int getCommand(FILE * source, char *command); |
| 106 | static int parseCommand(char **commandPtr, struct job *job, int *isBg); |
| 107 | static int setupRedirections(struct childProgram *prog); |
| 108 | static int runCommand(struct job newJob, struct jobSet *jobList, int inBg); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 109 | static int busy_loop(FILE * input); |
| 110 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 111 | |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 112 | /* Table of built-in functions */ |
| 113 | static struct builtInCommand bltins[] = { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 114 | {"bg", "Resume a job in the background", "bg [%%job]", shell_fg_bg}, |
| 115 | {"cd", "Change working directory", "cd [dir]", shell_cd}, |
| 116 | //{"echo", "Echo arguments on stdout", "echo arg1 [...]", shell_echo}, |
| 117 | {"env", "Print all environment variables", "env", shell_env}, |
| 118 | {"exit", "Exit from shell()", "exit", shell_exit}, |
| 119 | {"fg", "Bring job into the foreground", "fg [%%job]", shell_fg_bg}, |
| 120 | {"jobs", "Lists the active jobs", "jobs", shell_jobs}, |
| 121 | {"pwd", "Print current directory", "pwd", shell_pwd}, |
| 122 | {"set", "Set environment variable", "set [VAR=value]", shell_set}, |
| 123 | {"unset", "Unset environment variable", "unset VAR", shell_unset}, |
| 124 | {".", "Source-in and run commands in a file", ". filename", |
| 125 | shell_source}, |
| 126 | {"help", "List shell built-in commands", "help", shell_help}, |
| 127 | {NULL, NULL, NULL, NULL} |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 128 | }; |
| 129 | |
| 130 | static const char shell_usage[] = |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 131 | "sh [FILE]...\n\n" "The BusyBox command interpreter (shell).\n\n"; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 132 | |
| 133 | |
| 134 | static char cwd[1024]; |
| 135 | static char *prompt = "# "; |
| 136 | |
| 137 | |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 138 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 139 | /* built-in 'cd <path>' handler */ |
| 140 | static int shell_cd(struct job *cmd, struct jobSet *junk) |
| 141 | { |
| 142 | char *newdir; |
| 143 | if (!cmd->progs[0].argv[1] == 1) |
| 144 | newdir = getenv("HOME"); |
| 145 | else |
| 146 | newdir = cmd->progs[0].argv[1]; |
| 147 | if (chdir(newdir)) { |
| 148 | printf("cd: %s: %s\n", newdir, strerror(errno)); |
| 149 | return FALSE; |
| 150 | } |
| 151 | getcwd(cwd, sizeof(cwd)); |
| 152 | |
| 153 | return TRUE; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 154 | } |
| 155 | |
| 156 | /* built-in 'env' handler */ |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 157 | static int shell_env(struct job *dummy, struct jobSet *junk) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 158 | { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 159 | char **e; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 160 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 161 | for (e = environ; *e; e++) { |
| 162 | fprintf(stdout, "%s\n", *e); |
| 163 | } |
| 164 | return (0); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 165 | } |
| 166 | |
| 167 | /* built-in 'exit' handler */ |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 168 | static int shell_exit(struct job *cmd, struct jobSet *junk) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 169 | { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 170 | if (!cmd->progs[0].argv[1] == 1) |
| 171 | exit TRUE; |
| 172 | else |
| 173 | exit(atoi(cmd->progs[0].argv[1])); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 174 | } |
| 175 | |
| 176 | /* built-in 'fg' and 'bg' handler */ |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 177 | static int shell_fg_bg(struct job *cmd, struct jobSet *jobList) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 178 | { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 179 | int i, jobNum; |
| 180 | struct job *job; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 181 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 182 | if (!jobList->head) { |
| 183 | if (!cmd->progs[0].argv[1] || cmd->progs[0].argv[2]) { |
| 184 | fprintf(stderr, "%s: exactly one argument is expected\n", |
| 185 | cmd->progs[0].argv[0]); |
| 186 | return FALSE; |
| 187 | } |
| 188 | if (sscanf(cmd->progs[0].argv[1], "%%%d", &jobNum) != 1) { |
| 189 | fprintf(stderr, "%s: bad argument '%s'\n", |
| 190 | cmd->progs[0].argv[0], cmd->progs[0].argv[1]); |
| 191 | return FALSE; |
| 192 | } |
| 193 | } else { |
| 194 | job = jobList->head; |
| 195 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 196 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 197 | for (job = jobList->head; job; job = job->next) |
| 198 | if (job->jobId == jobNum) |
| 199 | break; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 200 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 201 | if (!job) { |
| 202 | fprintf(stderr, "%s: unknown job %d\n", |
| 203 | cmd->progs[0].argv[0], jobNum); |
| 204 | return FALSE; |
| 205 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 206 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 207 | if (*cmd->progs[0].argv[0] == 'f') { |
| 208 | /* Make this job the foreground job */ |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 209 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 210 | if (tcsetpgrp(0, job->pgrp)) |
| 211 | perror("tcsetpgrp"); |
| 212 | jobList->fg = job; |
| 213 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 214 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 215 | /* Restart the processes in the job */ |
| 216 | for (i = 0; i < job->numProgs; i++) |
| 217 | job->progs[i].isStopped = 0; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 218 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 219 | kill(-job->pgrp, SIGCONT); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 220 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 221 | job->stoppedProgs = 0; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 222 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 223 | return TRUE; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 224 | } |
| 225 | |
| 226 | /* built-in 'help' handler */ |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 227 | static int shell_help(struct job *cmd, struct jobSet *junk) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 228 | { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 229 | struct builtInCommand *x; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 230 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 231 | fprintf(stdout, "\nBuilt-in commands:\n"); |
| 232 | fprintf(stdout, "-------------------\n"); |
| 233 | for (x = bltins; x->cmd; x++) { |
| 234 | fprintf(stdout, "%s\t%s\n", x->cmd, x->descr); |
| 235 | } |
| 236 | fprintf(stdout, "\n\n"); |
| 237 | return TRUE; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 238 | } |
| 239 | |
| 240 | /* built-in 'jobs' handler */ |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 241 | static int shell_jobs(struct job *dummy, struct jobSet *jobList) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 242 | { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 243 | struct job *job; |
| 244 | char *statusString; |
| 245 | for (job = jobList->head; job; job = job->next) { |
| 246 | if (job->runningProgs == job->stoppedProgs) |
| 247 | statusString = "Stopped"; |
| 248 | else |
| 249 | statusString = "Running"; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 250 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 251 | printf(JOB_STATUS_FORMAT, job->jobId, statusString, job->text); |
| 252 | } |
| 253 | return TRUE; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 254 | } |
| 255 | |
| 256 | |
| 257 | /* built-in 'pwd' handler */ |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 258 | static int shell_pwd(struct job *dummy, struct jobSet *junk) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 259 | { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 260 | getcwd(cwd, sizeof(cwd)); |
| 261 | fprintf(stdout, "%s\n", cwd); |
| 262 | return TRUE; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 263 | } |
| 264 | |
| 265 | /* built-in 'set VAR=value' handler */ |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 266 | static int shell_set(struct job *cmd, struct jobSet *junk) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 267 | { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 268 | int res; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 269 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 270 | if (!cmd->progs[0].argv[1] == 1) { |
| 271 | return (shell_env(cmd, junk)); |
| 272 | } |
| 273 | res = putenv(cmd->progs[0].argv[1]); |
| 274 | if (res) |
| 275 | fprintf(stdout, "set: %s\n", strerror(errno)); |
| 276 | return (res); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 277 | } |
| 278 | |
| 279 | /* Built-in '.' handler (read-in and execute commands from file) */ |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 280 | static int shell_source(struct job *cmd, struct jobSet *junk) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 281 | { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 282 | FILE *input; |
| 283 | int status; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 284 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 285 | if (!cmd->progs[0].argv[1] == 1) |
| 286 | return FALSE; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 287 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 288 | input = fopen(cmd->progs[0].argv[1], "r"); |
| 289 | if (!input) { |
| 290 | fprintf(stdout, "Couldn't open file '%s'\n", |
| 291 | cmd->progs[0].argv[1]); |
| 292 | return FALSE; |
| 293 | } |
| 294 | |
| 295 | /* Now run the file */ |
| 296 | status = busy_loop(input); |
| 297 | return (status); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 298 | } |
| 299 | |
| 300 | /* built-in 'unset VAR' handler */ |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 301 | static int shell_unset(struct job *cmd, struct jobSet *junk) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 302 | { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 303 | if (!cmd->progs[0].argv[1] == 1) { |
| 304 | fprintf(stdout, "unset: parameter required.\n"); |
| 305 | return FALSE; |
| 306 | } |
| 307 | unsetenv(cmd->progs[0].argv[1]); |
| 308 | return TRUE; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 309 | } |
| 310 | |
| 311 | /* free up all memory from a job */ |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 312 | static void freeJob(struct job *cmd) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 313 | { |
| 314 | int i; |
| 315 | |
| 316 | for (i = 0; i < cmd->numProgs; i++) { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 317 | free(cmd->progs[i].argv); |
| 318 | if (cmd->progs[i].redirections) |
| 319 | free(cmd->progs[i].redirections); |
| 320 | if (cmd->progs[i].freeGlob) |
| 321 | globfree(&cmd->progs[i].globResult); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 322 | } |
| 323 | free(cmd->progs); |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 324 | if (cmd->text) |
| 325 | free(cmd->text); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 326 | free(cmd->cmdBuf); |
| 327 | } |
| 328 | |
| 329 | /* remove a job from the jobList */ |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 330 | static void removeJob(struct jobSet *jobList, struct job *job) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 331 | { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 332 | struct job *prevJob; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 333 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 334 | freeJob(job); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 335 | if (job == jobList->head) { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 336 | jobList->head = job->next; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 337 | } else { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 338 | prevJob = jobList->head; |
| 339 | while (prevJob->next != job) |
| 340 | prevJob = prevJob->next; |
| 341 | prevJob->next = job->next; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 342 | } |
| 343 | |
| 344 | free(job); |
| 345 | } |
| 346 | |
| 347 | /* Checks to see if any background processes have exited -- if they |
| 348 | have, figure out why and see if a job has completed */ |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 349 | static void checkJobs(struct jobSet *jobList) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 350 | { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 351 | struct job *job; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 352 | pid_t childpid; |
| 353 | int status; |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 354 | int progNum = 0; |
| 355 | |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 356 | while ((childpid = waitpid(-1, &status, WNOHANG | WUNTRACED)) > 0) { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 357 | for (job = jobList->head; job; job = job->next) { |
| 358 | progNum = 0; |
| 359 | while (progNum < job->numProgs && |
| 360 | job->progs[progNum].pid != childpid) progNum++; |
| 361 | if (progNum < job->numProgs) |
| 362 | break; |
| 363 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 364 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 365 | if (WIFEXITED(status) || WIFSIGNALED(status)) { |
| 366 | /* child exited */ |
| 367 | job->runningProgs--; |
| 368 | job->progs[progNum].pid = 0; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 369 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 370 | if (!job->runningProgs) { |
| 371 | printf(JOB_STATUS_FORMAT, job->jobId, "Done", job->text); |
| 372 | removeJob(jobList, job); |
| 373 | } |
| 374 | } else { |
| 375 | /* child stopped */ |
| 376 | job->stoppedProgs++; |
| 377 | job->progs[progNum].isStopped = 1; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 378 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 379 | if (job->stoppedProgs == job->numProgs) { |
| 380 | printf(JOB_STATUS_FORMAT, job->jobId, "Stopped", |
| 381 | job->text); |
| 382 | } |
| 383 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 384 | } |
| 385 | |
| 386 | if (childpid == -1 && errno != ECHILD) |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 387 | perror("waitpid"); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 388 | } |
| 389 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 390 | static int getCommand(FILE * source, char *command) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 391 | { |
| 392 | if (source == stdin) { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 393 | fprintf(stdout, "BBSHELL %s %s", cwd, prompt); |
| 394 | fflush(stdout); |
| 395 | #ifdef BB_FEATURE_SH_COMMAND_EDITING |
| 396 | cmdedit_read_input(fileno(stdin), fileno(stdout), command); |
| 397 | return 0; |
| 398 | #endif |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 399 | } |
| 400 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 401 | if (!fgets(command, BUFSIZ - 2, source)) { |
| 402 | if (source == stdin) |
| 403 | printf("\n"); |
| 404 | return 1; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 405 | } |
| 406 | |
| 407 | /* remove trailing newline */ |
| 408 | command[strlen(command) - 1] = '\0'; |
| 409 | |
| 410 | return 0; |
| 411 | } |
| 412 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 413 | static void globLastArgument(struct childProgram *prog, int *argcPtr, |
| 414 | int *argcAllocedPtr) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 415 | { |
| 416 | int argc = *argcPtr; |
| 417 | int argcAlloced = *argcAllocedPtr; |
| 418 | int rc; |
| 419 | int flags; |
| 420 | int i; |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 421 | char *src, *dst; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 422 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 423 | if (argc > 1) { /* cmd->globResult is already initialized */ |
| 424 | flags = GLOB_APPEND; |
| 425 | i = prog->globResult.gl_pathc; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 426 | } else { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 427 | prog->freeGlob = 1; |
| 428 | flags = 0; |
| 429 | i = 0; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 430 | } |
| 431 | |
| 432 | rc = glob(prog->argv[argc - 1], flags, NULL, &prog->globResult); |
| 433 | if (rc == GLOB_NOSPACE) { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 434 | fprintf(stderr, "out of space during glob operation\n"); |
| 435 | return; |
| 436 | } else if (rc == GLOB_NOMATCH || |
| 437 | (!rc && (prog->globResult.gl_pathc - i) == 1 && |
| 438 | !strcmp(prog->argv[argc - 1], |
| 439 | prog->globResult.gl_pathv[i]))) { |
| 440 | /* we need to remove whatever \ quoting is still present */ |
| 441 | src = dst = prog->argv[argc - 1]; |
| 442 | while (*src) { |
| 443 | if (*src != '\\') |
| 444 | *dst++ = *src; |
| 445 | src++; |
| 446 | } |
| 447 | *dst = '\0'; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 448 | } else if (!rc) { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 449 | argcAlloced += (prog->globResult.gl_pathc - i); |
| 450 | prog->argv = |
| 451 | realloc(prog->argv, argcAlloced * sizeof(*prog->argv)); |
| 452 | memcpy(prog->argv + (argc - 1), prog->globResult.gl_pathv + i, |
| 453 | sizeof(*(prog->argv)) * (prog->globResult.gl_pathc - i)); |
| 454 | argc += (prog->globResult.gl_pathc - i - 1); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 455 | } |
| 456 | |
| 457 | *argcAllocedPtr = argcAlloced; |
| 458 | *argcPtr = argc; |
| 459 | } |
| 460 | |
| 461 | /* Return cmd->numProgs as 0 if no command is present (e.g. an empty |
| 462 | line). If a valid command is found, commandPtr is set to point to |
| 463 | the beginning of the next command (if the original command had more |
| 464 | then one job associated with it) or NULL if no more commands are |
| 465 | present. */ |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 466 | static int parseCommand(char **commandPtr, struct job *job, int *isBg) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 467 | { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 468 | char *command; |
| 469 | char *returnCommand = NULL; |
| 470 | char *src, *buf, *chptr; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 471 | int argc = 0; |
| 472 | int done = 0; |
| 473 | int argvAlloced; |
| 474 | int i; |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 475 | char quote = '\0'; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 476 | int count; |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 477 | struct childProgram *prog; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 478 | |
| 479 | /* skip leading white space */ |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 480 | while (**commandPtr && isspace(**commandPtr)) |
| 481 | (*commandPtr)++; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 482 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 483 | /* this handles empty lines or leading '#' characters */ |
| 484 | if (!**commandPtr || (**commandPtr == '#')) { |
| 485 | job->numProgs = 0; |
| 486 | *commandPtr = NULL; |
| 487 | return 0; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 488 | } |
| 489 | |
| 490 | *isBg = 0; |
| 491 | job->numProgs = 1; |
| 492 | job->progs = malloc(sizeof(*job->progs)); |
| 493 | |
| 494 | /* We set the argv elements to point inside of this string. The |
| 495 | memory is freed by freeJob(). |
| 496 | |
| 497 | Getting clean memory relieves us of the task of NULL |
| 498 | terminating things and makes the rest of this look a bit |
| 499 | cleaner (though it is, admittedly, a tad less efficient) */ |
| 500 | job->cmdBuf = command = calloc(1, strlen(*commandPtr) + 1); |
| 501 | job->text = NULL; |
| 502 | |
| 503 | prog = job->progs; |
| 504 | prog->numRedirections = 0; |
| 505 | prog->redirections = NULL; |
| 506 | prog->freeGlob = 0; |
| 507 | prog->isStopped = 0; |
| 508 | |
| 509 | argvAlloced = 5; |
| 510 | prog->argv = malloc(sizeof(*prog->argv) * argvAlloced); |
| 511 | prog->argv[0] = job->cmdBuf; |
| 512 | |
| 513 | buf = command; |
| 514 | src = *commandPtr; |
| 515 | while (*src && !done) { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 516 | if (quote == *src) { |
| 517 | quote = '\0'; |
| 518 | } else if (quote) { |
| 519 | if (*src == '\\') { |
| 520 | src++; |
| 521 | if (!*src) { |
| 522 | fprintf(stderr, "character expected after \\\n"); |
| 523 | freeJob(job); |
| 524 | return 1; |
| 525 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 526 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 527 | /* in shell, "\'" should yield \' */ |
| 528 | if (*src != quote) |
| 529 | *buf++ = '\\'; |
| 530 | } else if (*src == '*' || *src == '?' || *src == '[' || |
| 531 | *src == ']') *buf++ = '\\'; |
| 532 | *buf++ = *src; |
| 533 | } else if (isspace(*src)) { |
| 534 | if (*prog->argv[argc]) { |
| 535 | buf++, argc++; |
| 536 | /* +1 here leaves room for the NULL which ends argv */ |
| 537 | if ((argc + 1) == argvAlloced) { |
| 538 | argvAlloced += 5; |
| 539 | prog->argv = realloc(prog->argv, |
| 540 | sizeof(*prog->argv) * |
| 541 | argvAlloced); |
| 542 | } |
| 543 | prog->argv[argc] = buf; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 544 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 545 | globLastArgument(prog, &argc, &argvAlloced); |
| 546 | } |
| 547 | } else |
| 548 | switch (*src) { |
| 549 | case '"': |
| 550 | case '\'': |
| 551 | quote = *src; |
| 552 | break; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 553 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 554 | case '#': /* comment */ |
| 555 | done = 1; |
| 556 | break; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 557 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 558 | case '>': /* redirections */ |
| 559 | case '<': |
| 560 | i = prog->numRedirections++; |
| 561 | prog->redirections = realloc(prog->redirections, |
| 562 | sizeof(*prog->redirections) * |
| 563 | (i + 1)); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 564 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 565 | prog->redirections[i].fd = -1; |
| 566 | if (buf != prog->argv[argc]) { |
| 567 | /* the stuff before this character may be the file number |
| 568 | being redirected */ |
| 569 | prog->redirections[i].fd = |
| 570 | strtol(prog->argv[argc], &chptr, 10); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 571 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 572 | if (*chptr && *prog->argv[argc]) { |
| 573 | buf++, argc++; |
| 574 | globLastArgument(prog, &argc, &argvAlloced); |
| 575 | } |
| 576 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 577 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 578 | if (prog->redirections[i].fd == -1) { |
| 579 | if (*src == '>') |
| 580 | prog->redirections[i].fd = 1; |
| 581 | else |
| 582 | prog->redirections[i].fd = 0; |
| 583 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 584 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 585 | if (*src++ == '>') { |
| 586 | if (*src == '>') |
| 587 | prog->redirections[i].type = |
| 588 | REDIRECT_APPEND, src++; |
| 589 | else |
| 590 | prog->redirections[i].type = REDIRECT_OVERWRITE; |
| 591 | } else { |
| 592 | prog->redirections[i].type = REDIRECT_INPUT; |
| 593 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 594 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 595 | /* This isn't POSIX sh compliant. Oh well. */ |
| 596 | chptr = src; |
| 597 | while (isspace(*chptr)) |
| 598 | chptr++; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 599 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 600 | if (!*chptr) { |
| 601 | fprintf(stderr, "file name expected after %c\n", *src); |
| 602 | freeJob(job); |
| 603 | return 1; |
| 604 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 605 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 606 | prog->redirections[i].filename = buf; |
| 607 | while (*chptr && !isspace(*chptr)) |
| 608 | *buf++ = *chptr++; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 609 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 610 | src = chptr - 1; /* we src++ later */ |
| 611 | prog->argv[argc] = ++buf; |
| 612 | break; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 613 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 614 | case '|': /* pipe */ |
| 615 | /* finish this command */ |
| 616 | if (*prog->argv[argc]) |
| 617 | argc++; |
| 618 | if (!argc) { |
| 619 | fprintf(stderr, "empty command in pipe\n"); |
| 620 | freeJob(job); |
| 621 | return 1; |
| 622 | } |
| 623 | prog->argv[argc] = NULL; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 624 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 625 | /* and start the next */ |
| 626 | job->numProgs++; |
| 627 | job->progs = realloc(job->progs, |
| 628 | sizeof(*job->progs) * job->numProgs); |
| 629 | prog = job->progs + (job->numProgs - 1); |
| 630 | prog->numRedirections = 0; |
| 631 | prog->redirections = NULL; |
| 632 | prog->freeGlob = 0; |
| 633 | argc = 0; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 634 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 635 | argvAlloced = 5; |
| 636 | prog->argv = malloc(sizeof(*prog->argv) * argvAlloced); |
| 637 | prog->argv[0] = ++buf; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 638 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 639 | src++; |
| 640 | while (*src && isspace(*src)) |
| 641 | src++; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 642 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 643 | if (!*src) { |
| 644 | fprintf(stderr, "empty command in pipe\n"); |
| 645 | return 1; |
| 646 | } |
| 647 | src--; /* we'll ++ it at the end of the loop */ |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 648 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 649 | break; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 650 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 651 | case '&': /* background */ |
| 652 | *isBg = 1; |
| 653 | case ';': /* multiple commands */ |
| 654 | done = 1; |
| 655 | returnCommand = *commandPtr + (src - *commandPtr) + 1; |
| 656 | break; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 657 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 658 | case '\\': |
| 659 | src++; |
| 660 | if (!*src) { |
| 661 | freeJob(job); |
| 662 | fprintf(stderr, "character expected after \\\n"); |
| 663 | return 1; |
| 664 | } |
| 665 | if (*src == '*' || *src == '[' || *src == ']' |
| 666 | || *src == '?') *buf++ = '\\'; |
| 667 | /* fallthrough */ |
| 668 | default: |
| 669 | *buf++ = *src; |
| 670 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 671 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 672 | src++; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 673 | } |
| 674 | |
| 675 | if (*prog->argv[argc]) { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 676 | argc++; |
| 677 | globLastArgument(prog, &argc, &argvAlloced); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 678 | } |
| 679 | if (!argc) { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 680 | freeJob(job); |
| 681 | return 0; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 682 | } |
| 683 | prog->argv[argc] = NULL; |
| 684 | |
| 685 | if (!returnCommand) { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 686 | job->text = malloc(strlen(*commandPtr) + 1); |
| 687 | strcpy(job->text, *commandPtr); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 688 | } else { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 689 | /* This leaves any trailing spaces, which is a bit sloppy */ |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 690 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 691 | count = returnCommand - *commandPtr; |
| 692 | job->text = malloc(count + 1); |
| 693 | strncpy(job->text, *commandPtr, count); |
| 694 | job->text[count] = '\0'; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 695 | } |
| 696 | |
| 697 | *commandPtr = returnCommand; |
| 698 | |
| 699 | return 0; |
| 700 | } |
| 701 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 702 | static int runCommand(struct job newJob, struct jobSet *jobList, int inBg) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 703 | { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 704 | struct job *job; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 705 | int i; |
| 706 | int nextin, nextout; |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 707 | int pipefds[2]; /* pipefd[0] is for reading */ |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 708 | struct builtInCommand *x; |
| 709 | |
| 710 | /* handle built-ins here -- we don't fork() so we can't background |
| 711 | these very easily */ |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 712 | for (x = bltins; x->cmd; x++) { |
| 713 | if (!strcmp(newJob.progs[0].argv[0], x->cmd)) { |
| 714 | return (x->function(&newJob, jobList)); |
| 715 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 716 | } |
| 717 | |
| 718 | nextin = 0, nextout = 1; |
| 719 | for (i = 0; i < newJob.numProgs; i++) { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 720 | if ((i + 1) < newJob.numProgs) { |
| 721 | pipe(pipefds); |
| 722 | nextout = pipefds[1]; |
| 723 | } else { |
| 724 | nextout = 1; |
| 725 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 726 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 727 | if (!(newJob.progs[i].pid = fork())) { |
| 728 | signal(SIGTTOU, SIG_DFL); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 729 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 730 | if (nextin != 0) { |
| 731 | dup2(nextin, 0); |
| 732 | close(nextin); |
| 733 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 734 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 735 | if (nextout != 1) { |
| 736 | dup2(nextout, 1); |
| 737 | close(nextout); |
| 738 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 739 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 740 | /* explicit redirections override pipes */ |
| 741 | setupRedirections(newJob.progs + i); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 742 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 743 | execvp(newJob.progs[i].argv[0], newJob.progs[i].argv); |
| 744 | fatalError("sh: %s: %s\n", newJob.progs[i].argv[0], |
| 745 | strerror(errno)); |
| 746 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 747 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 748 | /* put our child in the process group whose leader is the |
| 749 | first process in this pipe */ |
| 750 | setpgid(newJob.progs[i].pid, newJob.progs[0].pid); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 751 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 752 | if (nextin != 0) |
| 753 | close(nextin); |
| 754 | if (nextout != 1) |
| 755 | close(nextout); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 756 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 757 | /* If there isn't another process, nextin is garbage |
| 758 | but it doesn't matter */ |
| 759 | nextin = pipefds[0]; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 760 | } |
| 761 | |
| 762 | newJob.pgrp = newJob.progs[0].pid; |
| 763 | |
| 764 | /* find the ID for the job to use */ |
| 765 | newJob.jobId = 1; |
| 766 | for (job = jobList->head; job; job = job->next) |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 767 | if (job->jobId >= newJob.jobId) |
| 768 | newJob.jobId = job->jobId + 1; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 769 | |
| 770 | /* add the job to the list of running jobs */ |
| 771 | if (!jobList->head) { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 772 | job = jobList->head = malloc(sizeof(*job)); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 773 | } else { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 774 | for (job = jobList->head; job->next; job = job->next); |
| 775 | job->next = malloc(sizeof(*job)); |
| 776 | job = job->next; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 777 | } |
| 778 | |
| 779 | *job = newJob; |
| 780 | job->next = NULL; |
| 781 | job->runningProgs = job->numProgs; |
| 782 | job->stoppedProgs = 0; |
| 783 | |
| 784 | if (inBg) { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 785 | /* we don't wait for background jobs to return -- append it |
| 786 | to the list of backgrounded jobs and leave it alone */ |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 787 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 788 | printf("[%d] %d\n", job->jobId, |
| 789 | newJob.progs[newJob.numProgs - 1].pid); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 790 | } else { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 791 | jobList->fg = job; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 792 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 793 | /* move the new process group into the foreground */ |
| 794 | |
| 795 | if (tcsetpgrp(0, newJob.pgrp)) |
| 796 | perror("tcsetpgrp"); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 797 | } |
| 798 | |
| 799 | return 0; |
| 800 | } |
| 801 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 802 | static int setupRedirections(struct childProgram *prog) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 803 | { |
| 804 | int i; |
| 805 | int openfd; |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 806 | int mode = O_RDONLY; |
| 807 | struct redirectionSpecifier *redir = prog->redirections; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 808 | |
| 809 | for (i = 0; i < prog->numRedirections; i++, redir++) { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 810 | switch (redir->type) { |
| 811 | case REDIRECT_INPUT: |
| 812 | mode = O_RDONLY; |
| 813 | break; |
| 814 | case REDIRECT_OVERWRITE: |
| 815 | mode = O_RDWR | O_CREAT | O_TRUNC; |
| 816 | break; |
| 817 | case REDIRECT_APPEND: |
| 818 | mode = O_RDWR | O_CREAT | O_APPEND; |
| 819 | break; |
| 820 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 821 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 822 | openfd = open(redir->filename, mode, 0666); |
| 823 | if (openfd < 0) { |
| 824 | /* this could get lost if stderr has been redirected, but |
| 825 | bash and ash both lose it as well (though zsh doesn't!) */ |
| 826 | fprintf(stderr, "error opening %s: %s\n", redir->filename, |
| 827 | strerror(errno)); |
| 828 | return 1; |
| 829 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 830 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 831 | if (openfd != redir->fd) { |
| 832 | dup2(openfd, redir->fd); |
| 833 | close(openfd); |
| 834 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 835 | } |
| 836 | |
| 837 | return 0; |
| 838 | } |
| 839 | |
| 840 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 841 | static int busy_loop(FILE * input) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 842 | { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 843 | char *command; |
| 844 | char *nextCommand = NULL; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 845 | struct jobSet jobList = { NULL, NULL }; |
| 846 | struct job newJob; |
| 847 | int i; |
| 848 | int status; |
| 849 | int inBg; |
| 850 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 851 | command = (char*) calloc(BUFSIZ, sizeof(char)); |
| 852 | |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 853 | /* don't pay any attention to this signal; it just confuses |
| 854 | things and isn't really meant for shells anyway */ |
| 855 | signal(SIGTTOU, SIG_IGN); |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 856 | |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 857 | while (1) { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 858 | if (!jobList.fg) { |
| 859 | /* no job is in the foreground */ |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 860 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 861 | /* see if any background processes have exited */ |
| 862 | checkJobs(&jobList); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 863 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 864 | if (!nextCommand) { |
| 865 | if (getCommand(input, command)) |
| 866 | break; |
| 867 | nextCommand = command; |
| 868 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 869 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 870 | if (!parseCommand(&nextCommand, &newJob, &inBg) && |
| 871 | newJob.numProgs) { |
| 872 | runCommand(newJob, &jobList, inBg); |
| 873 | } |
| 874 | } else { |
| 875 | /* a job is running in the foreground; wait for it */ |
| 876 | i = 0; |
| 877 | while (!jobList.fg->progs[i].pid || |
| 878 | jobList.fg->progs[i].isStopped) i++; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 879 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 880 | waitpid(jobList.fg->progs[i].pid, &status, WUNTRACED); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 881 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 882 | if (WIFEXITED(status) || WIFSIGNALED(status)) { |
| 883 | /* the child exited */ |
| 884 | jobList.fg->runningProgs--; |
| 885 | jobList.fg->progs[i].pid = 0; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 886 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 887 | if (!jobList.fg->runningProgs) { |
| 888 | /* child exited */ |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 889 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 890 | removeJob(&jobList, jobList.fg); |
| 891 | jobList.fg = NULL; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 892 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 893 | /* move the shell to the foreground */ |
| 894 | if (tcsetpgrp(0, getpid())) |
| 895 | perror("tcsetpgrp"); |
| 896 | } |
| 897 | } else { |
| 898 | /* the child was stopped */ |
| 899 | jobList.fg->stoppedProgs++; |
| 900 | jobList.fg->progs[i].isStopped = 1; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 901 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 902 | if (jobList.fg->stoppedProgs == jobList.fg->runningProgs) { |
| 903 | printf("\n" JOB_STATUS_FORMAT, jobList.fg->jobId, |
| 904 | "Stopped", jobList.fg->text); |
| 905 | jobList.fg = NULL; |
| 906 | } |
| 907 | } |
| 908 | |
| 909 | if (!jobList.fg) { |
| 910 | /* move the shell to the foreground */ |
| 911 | if (tcsetpgrp(0, getpid())) |
| 912 | perror("tcsetpgrp"); |
| 913 | } |
| 914 | } |
| 915 | } |
| 916 | free( command); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 917 | |
| 918 | return 0; |
| 919 | } |
| 920 | |
| 921 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 922 | int shell_main(int argc, char **argv) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 923 | { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 924 | FILE *input = stdin; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 925 | |
| 926 | if (argc > 2) { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 927 | usage(shell_usage); |
| 928 | } |
| 929 | /* initialize the cwd */ |
| 930 | getcwd(cwd, sizeof(cwd)); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 931 | |
| 932 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 933 | //if (argv[0] && argv[0][0] == '-') { |
| 934 | // shell_source("/etc/profile"); |
| 935 | //} |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 936 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame^] | 937 | if (argc < 2) { |
| 938 | fprintf(stdout, "\n\nBusyBox v%s (%s) Built-in shell\n", BB_VER, |
| 939 | BB_BT); |
| 940 | fprintf(stdout, |
| 941 | "Enter 'help' for a list of built-in commands.\n\n"); |
| 942 | } else { |
| 943 | input = fopen(argv[1], "r"); |
| 944 | if (!input) |
| 945 | fatalError("A: Couldn't open file '%s': %s\n", argv[1], |
| 946 | strerror(errno)); |
| 947 | // else |
| 948 | // fatalError("Got it.\n"); |
| 949 | //exit(shell_source(argv[1])); |
| 950 | |
| 951 | /* Set terminal IO to canonical mode, and save old term settings. */ |
| 952 | #ifdef BB_FEATURE_SH_COMMAND_EDITING |
| 953 | cmdedit_init(); |
| 954 | #endif |
| 955 | } |
| 956 | |
| 957 | return (busy_loop(input)); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 958 | } |