1 /* $OpenBSD: cmd-run-shell.c,v 1.3 2009/10/11 09:04:33 nicm Exp $ */ 2 3 /* 4 * Copyright (c) 2009 Tiago Cunha <me@tiagocunha.org> 5 * Copyright (c) 2009 Nicholas Marriott <nicm@openbsd.org> 6 * 7 * Permission to use, copy, modify, and distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER 16 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING 17 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 #include <sys/types.h> 21 #include <sys/wait.h> 22 23 #include <string.h> 24 25 #include "tmux.h" 26 27 /* 28 * Runs a command without a window. 29 */ 30 31 int cmd_run_shell_exec(struct cmd *, struct cmd_ctx *); 32 33 void cmd_run_shell_callback(struct job *); 34 void cmd_run_shell_free(void *); 35 36 const struct cmd_entry cmd_run_shell_entry = { 37 "run-shell", "run", 38 "command", 39 CMD_ARG1, 0, 40 cmd_target_init, 41 cmd_target_parse, 42 cmd_run_shell_exec, 43 cmd_target_free, 44 cmd_target_print 45 }; 46 47 struct cmd_run_shell_data { 48 char *cmd; 49 struct cmd_ctx ctx; 50 }; 51 52 int 53 cmd_run_shell_exec(struct cmd *self, struct cmd_ctx *ctx) 54 { 55 struct cmd_target_data *data = self->data; 56 struct cmd_run_shell_data *cdata; 57 struct job *job; 58 59 cdata = xmalloc(sizeof *cdata); 60 cdata->cmd = xstrdup(data->arg); 61 memcpy(&cdata->ctx, ctx, sizeof cdata->ctx); 62 63 if (ctx->cmdclient != NULL) 64 ctx->cmdclient->references++; 65 if (ctx->curclient != NULL) 66 ctx->curclient->references++; 67 68 job = job_add(NULL, NULL, 69 data->arg, cmd_run_shell_callback, cmd_run_shell_free, cdata); 70 job_run(job); 71 72 return (1); /* don't let client exit */ 73 } 74 75 void 76 cmd_run_shell_callback(struct job *job) 77 { 78 struct cmd_run_shell_data *cdata = job->data; 79 struct cmd_ctx *ctx = &cdata->ctx; 80 char *cmd, *msg, *line, *buf; 81 size_t off, len, llen; 82 int retcode; 83 84 buf = BUFFER_OUT(job->out); 85 len = BUFFER_USED(job->out); 86 87 cmd = cdata->cmd; 88 89 if (len != 0) { 90 line = buf; 91 for (off = 0; off < len; off++) { 92 if (buf[off] == '\n') { 93 llen = buf + off - line; 94 if (llen > INT_MAX) 95 break; 96 ctx->print(ctx, "%.*s", (int) llen, line); 97 line = buf + off + 1; 98 } 99 } 100 llen = buf + len - line; 101 if (llen > 0 && llen < INT_MAX) 102 ctx->print(ctx, "%.*s", (int) llen, line); 103 } 104 105 msg = NULL; 106 if (WIFEXITED(job->status)) { 107 if ((retcode = WEXITSTATUS(job->status)) != 0) 108 xasprintf(&msg, "'%s' returned %d", cmd, retcode); 109 } else if (WIFSIGNALED(job->status)) { 110 retcode = WTERMSIG(job->status); 111 xasprintf(&msg, "'%s' terminated by signal %d", cmd, retcode); 112 } 113 if (msg != NULL) { 114 if (len != 0) 115 ctx->print(ctx, "%s", msg); 116 else 117 ctx->info(ctx, "%s", msg); 118 xfree(msg); 119 } 120 121 job_free(job); /* calls cmd_run_shell_free */ 122 } 123 124 void 125 cmd_run_shell_free(void *data) 126 { 127 struct cmd_run_shell_data *cdata = data; 128 struct cmd_ctx *ctx = &cdata->ctx; 129 130 if (ctx->cmdclient != NULL) { 131 ctx->cmdclient->references--; 132 server_write_client(ctx->cmdclient, MSG_EXIT, NULL, 0); 133 } 134 if (ctx->curclient != NULL) 135 ctx->curclient->references--; 136 137 xfree(cdata->cmd); 138 xfree(cdata); 139 } 140