projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 18ae9d6b AS |
1 | /*- |
| 2 | * Copyright (c) 1992, 1993 | |
| 3 | * The Regents of the University of California. All rights reserved. | |
| 4 | * | |
| 5 | * Redistribution and use in source and binary forms, with or without | |
| 6 | * modification, are permitted provided that the following conditions | |
| 7 | * are met: | |
| 8 | * 1. Redistributions of source code must retain the above copyright | |
| 9 | * notice, this list of conditions and the following disclaimer. | |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright | |
| 11 | * notice, this list of conditions and the following disclaimer in the | |
| 12 | * documentation and/or other materials provided with the distribution. | |
| 13 | * 3. All advertising materials mentioning features or use of this software | |
| 14 | * must display the following acknowledgement: | |
| 15 | * This product includes software developed by the University of | |
| 16 | * California, Berkeley and its contributors. | |
| 17 | * 4. Neither the name of the University nor the names of its contributors | |
| 18 | * may be used to endorse or promote products derived from this software | |
| 19 | * without specific prior written permission. | |
| 20 | * | |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 31 | * SUCH DAMAGE. | |
| 32 | */ | |
| 33 | ||
| 34 | #ifndef lint | |
| 35 | static char sccsid[] = "@(#)ex_shell.c 8.17 (Berkeley) 12/23/93"; | |
| 36 | #endif /* not lint */ | |
| 37 | ||
| 38 | #include <sys/param.h> | |
| 39 | #include <sys/stat.h> | |
| 40 | ||
| 41 | #include <curses.h> | |
| 42 | #include <errno.h> | |
| 43 | #include <string.h> | |
| 44 | #include <unistd.h> | |
| 45 | ||
| 46 | #include "vi.h" | |
| 47 | #include "excmd.h" | |
| 48 | #include "../svi/svi_screen.h" | |
| 49 | ||
| 50 | /* | |
| 51 | * ex_shell -- :sh[ell] | |
| 52 | * Invoke the program named in the SHELL environment variable | |
| 53 | * with the argument -i. | |
| 54 | */ | |
| 55 | int | |
| 56 | ex_shell(sp, ep, cmdp) | |
| 57 | SCR *sp; | |
| 58 | EXF *ep; | |
| 59 | EXCMDARG *cmdp; | |
| 60 | { | |
| 61 | char buf[MAXPATHLEN]; | |
| 62 | ||
| 63 | (void)snprintf(buf, sizeof(buf), "%s -i", O_STR(sp, O_SHELL)); | |
| 64 | return (ex_exec_proc(sp, buf, "\n", NULL)); | |
| 65 | } | |
| 66 | ||
| 67 | /* | |
| 68 | * ex_exec_proc -- | |
| 69 | * Run a separate process. | |
| 70 | */ | |
| 71 | int | |
| 72 | ex_exec_proc(sp, cmd, p1, p2) | |
| 73 | SCR *sp; | |
| 74 | char *cmd, *p1, *p2; | |
| 75 | { | |
| 76 | struct sigaction act, oact; | |
| 77 | struct stat osb, sb; | |
| 78 | struct termios term; | |
| 79 | const char *name; | |
| 80 | pid_t pid; | |
| 81 | int isig, rval; | |
| 82 | ||
| 83 | /* Clear the rest of the screen. */ | |
| 84 | if (sp->s_clear(sp)) | |
| 85 | return (1); | |
| 86 | ||
| 87 | /* Save ex/vi terminal settings, and restore the original ones. */ | |
| 88 | EX_LEAVE(sp, isig, act, oact, sb, osb, term); | |
| 89 | ||
| 90 | /* Put out various messages. */ | |
| 91 | if (p1 != NULL) | |
| 92 | (void)write(STDOUT_FILENO, p1, strlen(p1)); | |
| 93 | if (p2 != NULL) | |
| 94 | (void)write(STDOUT_FILENO, p2, strlen(p2)); | |
| 95 | ||
| 96 | ||
| 97 | switch (pid = vfork()) { | |
| 98 | case -1: /* Error. */ | |
| 99 | msgq(sp, M_SYSERR, "vfork"); | |
| 100 | rval = 1; | |
| 101 | goto err; | |
| 102 | case 0: /* Utility. */ | |
| 103 | /* | |
| 104 | * The utility has default signal behavior. Don't bother | |
| 105 | * using sigaction(2) 'cause we want the default behavior. | |
| 106 | */ | |
| 107 | (void)signal(SIGINT, SIG_DFL); | |
| 108 | (void)signal(SIGQUIT, SIG_DFL); | |
| 109 | ||
| 110 | if ((name = strrchr(O_STR(sp, O_SHELL), '/')) == NULL) | |
| 111 | name = O_STR(sp, O_SHELL); | |
| 112 | else | |
| 113 | ++name; | |
| 114 | execl(O_STR(sp, O_SHELL), name, "-c", cmd, NULL); | |
| 115 | msgq(sp, M_ERR, "Error: execl: %s: %s", | |
| 116 | O_STR(sp, O_SHELL), strerror(errno)); | |
| 117 | _exit(127); | |
| 118 | /* NOTREACHED */ | |
| 119 | } | |
| 120 | ||
| 121 | rval = proc_wait(sp, (long)pid, cmd, 0); | |
| 122 | ||
| 123 | /* Restore ex/vi terminal settings. */ | |
| 124 | err: EX_RETURN(sp, isig, act, oact, sb, osb, term); | |
| 125 | ||
| 126 | /* | |
| 127 | * XXX | |
| 128 | * EX_LEAVE/EX_RETURN only give us 1-second resolution on the tty | |
| 129 | * changes. A fast '!' command, e.g. ":!pwd" can beat us to the | |
| 130 | * refresh. When there's better resolution from the stat(2) timers, | |
| 131 | * this can go away. | |
| 132 | */ | |
| 133 | F_SET(sp, S_REFRESH); | |
| 134 | ||
| 135 | return (rval); | |
| 136 | } |