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Annotation of src/usr.bin/tmux/cmd-run-shell.c, Revision 1.13

1.13    ! nicm        1: /* $OpenBSD: cmd-run-shell.c,v 1.12 2012/07/10 11:53:01 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:
1.12      nicm       23: #include <stdlib.h>
1.1       nicm       24: #include <string.h>
                     25:
                     26: #include "tmux.h"
                     27:
                     28: /*
                     29:  * Runs a command without a window.
                     30:  */
                     31:
1.13    ! nicm       32: enum cmd_retval         cmd_run_shell_exec(struct cmd *, struct cmd_ctx *);
        !            33: void            cmd_run_shell_callback(struct job *);
        !            34: void            cmd_run_shell_free(void *);
1.2       nicm       35:
1.1       nicm       36: const struct cmd_entry cmd_run_shell_entry = {
                     37:        "run-shell", "run",
1.10      nicm       38:        "", 1, 1,
1.1       nicm       39:        "command",
1.10      nicm       40:        0,
                     41:        NULL,
                     42:        NULL,
                     43:        cmd_run_shell_exec
1.1       nicm       44: };
                     45:
1.2       nicm       46: struct cmd_run_shell_data {
                     47:        char            *cmd;
                     48:        struct cmd_ctx   ctx;
                     49: };
                     50:
1.13    ! nicm       51: enum cmd_retval
1.1       nicm       52: cmd_run_shell_exec(struct cmd *self, struct cmd_ctx *ctx)
                     53: {
1.10      nicm       54:        struct args                     *args = self->args;
1.2       nicm       55:        struct cmd_run_shell_data       *cdata;
1.11      nicm       56:        const char                      *shellcmd = args->argv[0];
1.2       nicm       57:
                     58:        cdata = xmalloc(sizeof *cdata);
1.10      nicm       59:        cdata->cmd = xstrdup(args->argv[0]);
1.2       nicm       60:        memcpy(&cdata->ctx, ctx, sizeof cdata->ctx);
                     61:
                     62:        if (ctx->cmdclient != NULL)
                     63:                ctx->cmdclient->references++;
                     64:        if (ctx->curclient != NULL)
                     65:                ctx->curclient->references++;
                     66:
1.11      nicm       67:        job_run(shellcmd, cmd_run_shell_callback, cmd_run_shell_free, cdata);
1.2       nicm       68:
1.13    ! nicm       69:        return (CMD_RETURN_YIELD);      /* don't let client exit */
1.2       nicm       70: }
1.1       nicm       71:
1.2       nicm       72: void
                     73: cmd_run_shell_callback(struct job *job)
                     74: {
                     75:        struct cmd_run_shell_data       *cdata = job->data;
                     76:        struct cmd_ctx                  *ctx = &cdata->ctx;
1.5       nicm       77:        char                            *cmd, *msg, *line;
                     78:        size_t                           size;
1.2       nicm       79:        int                              retcode;
1.5       nicm       80:        u_int                            lines;
1.7       nicm       81:
                     82:        if (ctx->cmdclient != NULL && ctx->cmdclient->flags & CLIENT_DEAD)
                     83:                return;
                     84:        if (ctx->curclient != NULL && ctx->curclient->flags & CLIENT_DEAD)
                     85:                return;
1.2       nicm       86:
1.5       nicm       87:        lines = 0;
                     88:        do {
                     89:                if ((line = evbuffer_readline(job->event->input)) != NULL) {
                     90:                        ctx->print(ctx, "%s", line);
                     91:                        lines++;
                     92:                }
                     93:        } while (line != NULL);
                     94:
                     95:        size = EVBUFFER_LENGTH(job->event->input);
                     96:        if (size != 0) {
                     97:                line = xmalloc(size + 1);
                     98:                memcpy(line, EVBUFFER_DATA(job->event->input), size);
                     99:                line[size] = '\0';
1.2       nicm      100:
1.5       nicm      101:                ctx->print(ctx, "%s", line);
                    102:                lines++;
1.2       nicm      103:
1.12      nicm      104:                free(line);
1.1       nicm      105:        }
                    106:
1.5       nicm      107:        cmd = cdata->cmd;
                    108:
1.1       nicm      109:        msg = NULL;
1.2       nicm      110:        if (WIFEXITED(job->status)) {
                    111:                if ((retcode = WEXITSTATUS(job->status)) != 0)
                    112:                        xasprintf(&msg, "'%s' returned %d", cmd, retcode);
                    113:        } else if (WIFSIGNALED(job->status)) {
                    114:                retcode = WTERMSIG(job->status);
                    115:                xasprintf(&msg, "'%s' terminated by signal %d", cmd, retcode);
1.1       nicm      116:        }
                    117:        if (msg != NULL) {
1.5       nicm      118:                if (lines != 0)
1.1       nicm      119:                        ctx->print(ctx, "%s", msg);
                    120:                else
                    121:                        ctx->info(ctx, "%s", msg);
1.12      nicm      122:                free(msg);
1.1       nicm      123:        }
1.2       nicm      124: }
                    125:
                    126: void
                    127: cmd_run_shell_free(void *data)
                    128: {
                    129:        struct cmd_run_shell_data       *cdata = data;
                    130:        struct cmd_ctx                  *ctx = &cdata->ctx;
                    131:
                    132:        if (ctx->cmdclient != NULL) {
                    133:                ctx->cmdclient->references--;
1.9       nicm      134:                ctx->cmdclient->flags |= CLIENT_EXIT;
1.2       nicm      135:        }
                    136:        if (ctx->curclient != NULL)
                    137:                ctx->curclient->references--;
                    138:
1.12      nicm      139:        free(cdata->cmd);
                    140:        free(cdata);
1.1       nicm      141: }