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Annotation of src/usr.bin/tmux/cmd-run-shell.c, Revision 1.3

1.3     ! nicm        1: /* $OpenBSD: cmd-run-shell.c,v 1.2 2009/10/11 08:58:05 nicm Exp $ */
1.1       nicm        2:
                      3: /*
                      4:  * Copyright (c) 2009 Tiago Cunha <me@tiagocunha.org>
1.3     ! nicm        5:  * Copyright (c) 2009 Nicholas Marriott <nicm@openbsd.org>
1.1       nicm        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:
1.2       nicm       33: void   cmd_run_shell_callback(struct job *);
                     34: void   cmd_run_shell_free(void *);
                     35:
1.1       nicm       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:
1.2       nicm       47: struct cmd_run_shell_data {
                     48:        char            *cmd;
                     49:        struct cmd_ctx   ctx;
                     50: };
                     51:
1.1       nicm       52: int
                     53: cmd_run_shell_exec(struct cmd *self, struct cmd_ctx *ctx)
                     54: {
1.2       nicm       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: }
1.1       nicm       74:
1.2       nicm       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:                        }
1.1       nicm       99:                }
1.2       nicm      100:                llen = buf + len - line;
                    101:                if (llen > 0 && llen < INT_MAX)
                    102:                        ctx->print(ctx, "%.*s", (int) llen, line);
1.1       nicm      103:        }
                    104:
                    105:        msg = NULL;
1.2       nicm      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);
1.1       nicm      112:        }
                    113:        if (msg != NULL) {
1.2       nicm      114:                if (len != 0)
1.1       nicm      115:                        ctx->print(ctx, "%s", msg);
                    116:                else
                    117:                        ctx->info(ctx, "%s", msg);
                    118:                xfree(msg);
                    119:        }
                    120:
1.2       nicm      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);
1.1       nicm      139: }