Ben Lindstrom | 0690901 | 2001-03-05 06:09:31 +0000 | [diff] [blame] | 1 | /* $OpenBSD: misc.c,v 1.3 2001/02/28 05:34:28 deraadt Exp $ */ |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 2 | |
| 3 | /* |
| 4 | * Copyright (c) 2000 Markus Friedl. All rights reserved. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions |
| 8 | * are met: |
| 9 | * 1. Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * 2. Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in the |
| 13 | * documentation and/or other materials provided with the distribution. |
| 14 | * |
| 15 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 16 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 17 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 18 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 19 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 20 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 21 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 22 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 23 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 24 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 25 | */ |
| 26 | |
Damien Miller | 61c5150 | 2000-08-18 14:01:04 +1000 | [diff] [blame] | 27 | #include "includes.h" |
Ben Lindstrom | 0690901 | 2001-03-05 06:09:31 +0000 | [diff] [blame] | 28 | RCSID("$OpenBSD: misc.c,v 1.3 2001/02/28 05:34:28 deraadt Exp $"); |
Damien Miller | 61c5150 | 2000-08-18 14:01:04 +1000 | [diff] [blame] | 29 | |
Kevin Steves | b6e773a | 2001-02-04 13:20:36 +0000 | [diff] [blame] | 30 | #include "misc.h" |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 31 | #include "log.h" |
Ben Lindstrom | 0690901 | 2001-03-05 06:09:31 +0000 | [diff] [blame] | 32 | #include "xmalloc.h" |
Damien Miller | 61c5150 | 2000-08-18 14:01:04 +1000 | [diff] [blame] | 33 | |
| 34 | char * |
| 35 | chop(char *s) |
| 36 | { |
| 37 | char *t = s; |
| 38 | while (*t) { |
| 39 | if(*t == '\n' || *t == '\r') { |
| 40 | *t = '\0'; |
| 41 | return s; |
| 42 | } |
| 43 | t++; |
| 44 | } |
| 45 | return s; |
| 46 | |
| 47 | } |
| 48 | |
| 49 | void |
| 50 | set_nonblock(int fd) |
| 51 | { |
| 52 | int val; |
Damien Miller | 61c5150 | 2000-08-18 14:01:04 +1000 | [diff] [blame] | 53 | val = fcntl(fd, F_GETFL, 0); |
| 54 | if (val < 0) { |
| 55 | error("fcntl(%d, F_GETFL, 0): %s", fd, strerror(errno)); |
| 56 | return; |
| 57 | } |
Damien Miller | 69b69aa | 2000-10-28 14:19:58 +1100 | [diff] [blame] | 58 | if (val & O_NONBLOCK) { |
| 59 | debug("fd %d IS O_NONBLOCK", fd); |
Damien Miller | 61c5150 | 2000-08-18 14:01:04 +1000 | [diff] [blame] | 60 | return; |
Damien Miller | 69b69aa | 2000-10-28 14:19:58 +1100 | [diff] [blame] | 61 | } |
Damien Miller | 61c5150 | 2000-08-18 14:01:04 +1000 | [diff] [blame] | 62 | debug("fd %d setting O_NONBLOCK", fd); |
| 63 | val |= O_NONBLOCK; |
| 64 | if (fcntl(fd, F_SETFL, val) == -1) |
Damien Miller | caf6dd6 | 2000-08-29 11:33:50 +1100 | [diff] [blame] | 65 | if (errno != ENODEV) |
| 66 | error("fcntl(%d, F_SETFL, O_NONBLOCK): %s", |
| 67 | fd, strerror(errno)); |
Damien Miller | 61c5150 | 2000-08-18 14:01:04 +1000 | [diff] [blame] | 68 | } |
| 69 | |
| 70 | /* Characters considered whitespace in strsep calls. */ |
| 71 | #define WHITESPACE " \t\r\n" |
| 72 | |
| 73 | char * |
| 74 | strdelim(char **s) |
| 75 | { |
| 76 | char *old; |
| 77 | int wspace = 0; |
| 78 | |
| 79 | if (*s == NULL) |
| 80 | return NULL; |
| 81 | |
| 82 | old = *s; |
| 83 | |
| 84 | *s = strpbrk(*s, WHITESPACE "="); |
| 85 | if (*s == NULL) |
| 86 | return (old); |
| 87 | |
| 88 | /* Allow only one '=' to be skipped */ |
| 89 | if (*s[0] == '=') |
| 90 | wspace = 1; |
| 91 | *s[0] = '\0'; |
| 92 | |
| 93 | *s += strspn(*s + 1, WHITESPACE) + 1; |
| 94 | if (*s[0] == '=' && !wspace) |
| 95 | *s += strspn(*s + 1, WHITESPACE) + 1; |
| 96 | |
| 97 | return (old); |
| 98 | } |
Kevin Steves | b6e773a | 2001-02-04 13:20:36 +0000 | [diff] [blame] | 99 | |
Ben Lindstrom | 086cf21 | 2001-03-05 05:56:40 +0000 | [diff] [blame] | 100 | struct passwd * |
| 101 | pwcopy(struct passwd *pw) |
| 102 | { |
| 103 | struct passwd *copy = xmalloc(sizeof(*copy)); |
| 104 | memset(copy, 0, sizeof(*copy)); |
| 105 | copy->pw_name = xstrdup(pw->pw_name); |
| 106 | copy->pw_passwd = xstrdup(pw->pw_passwd); |
| 107 | copy->pw_uid = pw->pw_uid; |
| 108 | copy->pw_gid = pw->pw_gid; |
| 109 | copy->pw_class = xstrdup(pw->pw_class); |
| 110 | copy->pw_dir = xstrdup(pw->pw_dir); |
| 111 | copy->pw_shell = xstrdup(pw->pw_shell); |
| 112 | return copy; |
| 113 | } |
| 114 | |
Kevin Steves | b6e773a | 2001-02-04 13:20:36 +0000 | [diff] [blame] | 115 | mysig_t |
| 116 | mysignal(int sig, mysig_t act) |
| 117 | { |
| 118 | #ifdef HAVE_SIGACTION |
| 119 | struct sigaction sa, osa; |
| 120 | |
Kevin Steves | e74ebd0 | 2001-02-17 17:10:16 +0000 | [diff] [blame] | 121 | if (sigaction(sig, NULL, &osa) == -1) |
Kevin Steves | b6e773a | 2001-02-04 13:20:36 +0000 | [diff] [blame] | 122 | return (mysig_t) -1; |
| 123 | if (osa.sa_handler != act) { |
Kevin Steves | e74ebd0 | 2001-02-17 17:10:16 +0000 | [diff] [blame] | 124 | memset(&sa, 0, sizeof(sa)); |
Kevin Steves | b6e773a | 2001-02-04 13:20:36 +0000 | [diff] [blame] | 125 | sigemptyset(&sa.sa_mask); |
| 126 | sa.sa_flags = 0; |
Kevin Steves | eff26f2 | 2001-02-18 03:42:02 +0000 | [diff] [blame] | 127 | #if defined(SA_RESTART) |
Damien Miller | 722ccb1 | 2001-02-18 15:18:43 +1100 | [diff] [blame] | 128 | if (sig == SIGCHLD) |
Kevin Steves | 799bed8 | 2001-02-16 14:58:12 +0000 | [diff] [blame] | 129 | sa.sa_flags |= SA_RESTART; |
Damien Miller | 722ccb1 | 2001-02-18 15:18:43 +1100 | [diff] [blame] | 130 | #endif |
| 131 | #if defined(SA_INTERRUPT) |
| 132 | if (sig == SIGALRM) |
Damien Miller | 0318e2e | 2001-02-18 13:04:23 +1100 | [diff] [blame] | 133 | sa.sa_flags |= SA_INTERRUPT; |
| 134 | #endif |
Kevin Steves | b6e773a | 2001-02-04 13:20:36 +0000 | [diff] [blame] | 135 | sa.sa_handler = act; |
Kevin Steves | e74ebd0 | 2001-02-17 17:10:16 +0000 | [diff] [blame] | 136 | if (sigaction(sig, &sa, NULL) == -1) |
Kevin Steves | b6e773a | 2001-02-04 13:20:36 +0000 | [diff] [blame] | 137 | return (mysig_t) -1; |
| 138 | } |
| 139 | return (osa.sa_handler); |
| 140 | #else |
| 141 | return (signal(sig, act)); |
| 142 | #endif |
| 143 | } |