Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 1 | |
| 2 | /* |
| 3 | * Copyright (c) 1999-2004 Damien Miller <djm@mindrot.org> |
| 4 | * |
| 5 | * Permission to use, copy, modify, and distribute this software for any |
| 6 | * purpose with or without fee is hereby granted, provided that the above |
| 7 | * copyright notice and this permission notice appear in all copies. |
| 8 | * |
| 9 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| 10 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| 11 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| 12 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 13 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 14 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| 15 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 16 | */ |
| 17 | |
| 18 | #include "includes.h" |
| 19 | |
| 20 | #include <sys/types.h> |
| 21 | #ifdef HAVE_SYS_SELECT_H |
| 22 | # include <sys/select.h> |
| 23 | #endif |
| 24 | #ifdef HAVE_SYS_TIME_H |
| 25 | # include <sys/time.h> |
| 26 | #endif |
| 27 | |
| 28 | #include <string.h> |
| 29 | #include <signal.h> |
| 30 | #include <stdlib.h> |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 31 | #include <time.h> |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 32 | #include <unistd.h> |
| 33 | |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 34 | #ifndef HAVE___PROGNAME |
| 35 | char *__progname; |
| 36 | #endif |
| 37 | |
| 38 | /* |
| 39 | * NB. duplicate __progname in case it is an alias for argv[0] |
| 40 | * Otherwise it may get clobbered by setproctitle() |
| 41 | */ |
| 42 | char *ssh_get_progname(char *argv0) |
| 43 | { |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 44 | char *p, *q; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 45 | #ifdef HAVE___PROGNAME |
| 46 | extern char *__progname; |
| 47 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 48 | p = __progname; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 49 | #else |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 50 | if (argv0 == NULL) |
| 51 | return ("unknown"); /* XXX */ |
| 52 | p = strrchr(argv0, '/'); |
| 53 | if (p == NULL) |
| 54 | p = argv0; |
| 55 | else |
| 56 | p++; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 57 | #endif |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 58 | if ((q = strdup(p)) == NULL) { |
| 59 | perror("strdup"); |
| 60 | exit(1); |
| 61 | } |
| 62 | return q; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 63 | } |
| 64 | |
| 65 | #ifndef HAVE_SETLOGIN |
| 66 | int setlogin(const char *name) |
| 67 | { |
| 68 | return (0); |
| 69 | } |
| 70 | #endif /* !HAVE_SETLOGIN */ |
| 71 | |
| 72 | #ifndef HAVE_INNETGR |
| 73 | int innetgr(const char *netgroup, const char *host, |
| 74 | const char *user, const char *domain) |
| 75 | { |
| 76 | return (0); |
| 77 | } |
| 78 | #endif /* HAVE_INNETGR */ |
| 79 | |
| 80 | #if !defined(HAVE_SETEUID) && defined(HAVE_SETREUID) |
| 81 | int seteuid(uid_t euid) |
| 82 | { |
| 83 | return (setreuid(-1, euid)); |
| 84 | } |
| 85 | #endif /* !defined(HAVE_SETEUID) && defined(HAVE_SETREUID) */ |
| 86 | |
| 87 | #if !defined(HAVE_SETEGID) && defined(HAVE_SETRESGID) |
| 88 | int setegid(uid_t egid) |
| 89 | { |
| 90 | return(setresgid(-1, egid, -1)); |
| 91 | } |
| 92 | #endif /* !defined(HAVE_SETEGID) && defined(HAVE_SETRESGID) */ |
| 93 | |
| 94 | #if !defined(HAVE_STRERROR) && defined(HAVE_SYS_ERRLIST) && defined(HAVE_SYS_NERR) |
| 95 | const char *strerror(int e) |
| 96 | { |
| 97 | extern int sys_nerr; |
| 98 | extern char *sys_errlist[]; |
| 99 | |
| 100 | if ((e >= 0) && (e < sys_nerr)) |
| 101 | return (sys_errlist[e]); |
| 102 | |
| 103 | return ("unlisted error"); |
| 104 | } |
| 105 | #endif |
| 106 | |
| 107 | #ifndef HAVE_UTIMES |
| 108 | int utimes(char *filename, struct timeval *tvp) |
| 109 | { |
| 110 | struct utimbuf ub; |
| 111 | |
| 112 | ub.actime = tvp[0].tv_sec; |
| 113 | ub.modtime = tvp[1].tv_sec; |
| 114 | |
| 115 | return (utime(filename, &ub)); |
| 116 | } |
| 117 | #endif |
| 118 | |
| 119 | #ifndef HAVE_TRUNCATE |
| 120 | int truncate(const char *path, off_t length) |
| 121 | { |
| 122 | int fd, ret, saverrno; |
| 123 | |
| 124 | fd = open(path, O_WRONLY); |
| 125 | if (fd < 0) |
| 126 | return (-1); |
| 127 | |
| 128 | ret = ftruncate(fd, length); |
| 129 | saverrno = errno; |
| 130 | close(fd); |
| 131 | if (ret == -1) |
| 132 | errno = saverrno; |
| 133 | |
| 134 | return(ret); |
| 135 | } |
| 136 | #endif /* HAVE_TRUNCATE */ |
| 137 | |
| 138 | #if !defined(HAVE_NANOSLEEP) && !defined(HAVE_NSLEEP) |
| 139 | int nanosleep(const struct timespec *req, struct timespec *rem) |
| 140 | { |
| 141 | int rc, saverrno; |
| 142 | extern int errno; |
| 143 | struct timeval tstart, tstop, tremain, time2wait; |
| 144 | |
| 145 | TIMESPEC_TO_TIMEVAL(&time2wait, req) |
| 146 | (void) gettimeofday(&tstart, NULL); |
| 147 | rc = select(0, NULL, NULL, NULL, &time2wait); |
| 148 | if (rc == -1) { |
| 149 | saverrno = errno; |
| 150 | (void) gettimeofday (&tstop, NULL); |
| 151 | errno = saverrno; |
| 152 | tremain.tv_sec = time2wait.tv_sec - |
| 153 | (tstop.tv_sec - tstart.tv_sec); |
| 154 | tremain.tv_usec = time2wait.tv_usec - |
| 155 | (tstop.tv_usec - tstart.tv_usec); |
| 156 | tremain.tv_sec += tremain.tv_usec / 1000000L; |
| 157 | tremain.tv_usec %= 1000000L; |
| 158 | } else { |
| 159 | tremain.tv_sec = 0; |
| 160 | tremain.tv_usec = 0; |
| 161 | } |
| 162 | if (rem != NULL) |
| 163 | TIMEVAL_TO_TIMESPEC(&tremain, rem) |
| 164 | |
| 165 | return(rc); |
| 166 | } |
| 167 | #endif |
| 168 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 169 | #if !defined(HAVE_USLEEP) |
| 170 | int usleep(unsigned int useconds) |
| 171 | { |
| 172 | struct timespec ts; |
| 173 | |
| 174 | ts.tv_sec = useconds / 1000000; |
| 175 | ts.tv_nsec = (useconds % 1000000) * 1000; |
| 176 | return nanosleep(&ts, NULL); |
| 177 | } |
| 178 | #endif |
| 179 | |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 180 | #ifndef HAVE_TCGETPGRP |
| 181 | pid_t |
| 182 | tcgetpgrp(int fd) |
| 183 | { |
| 184 | int ctty_pgrp; |
| 185 | |
| 186 | if (ioctl(fd, TIOCGPGRP, &ctty_pgrp) == -1) |
| 187 | return(-1); |
| 188 | else |
| 189 | return(ctty_pgrp); |
| 190 | } |
| 191 | #endif /* HAVE_TCGETPGRP */ |
| 192 | |
| 193 | #ifndef HAVE_TCSENDBREAK |
| 194 | int |
| 195 | tcsendbreak(int fd, int duration) |
| 196 | { |
| 197 | # if defined(TIOCSBRK) && defined(TIOCCBRK) |
| 198 | struct timeval sleepytime; |
| 199 | |
| 200 | sleepytime.tv_sec = 0; |
| 201 | sleepytime.tv_usec = 400000; |
| 202 | if (ioctl(fd, TIOCSBRK, 0) == -1) |
| 203 | return (-1); |
| 204 | (void)select(0, 0, 0, 0, &sleepytime); |
| 205 | if (ioctl(fd, TIOCCBRK, 0) == -1) |
| 206 | return (-1); |
| 207 | return (0); |
| 208 | # else |
| 209 | return -1; |
| 210 | # endif |
| 211 | } |
| 212 | #endif /* HAVE_TCSENDBREAK */ |
| 213 | |
| 214 | mysig_t |
| 215 | mysignal(int sig, mysig_t act) |
| 216 | { |
| 217 | #ifdef HAVE_SIGACTION |
| 218 | struct sigaction sa, osa; |
| 219 | |
| 220 | if (sigaction(sig, NULL, &osa) == -1) |
| 221 | return (mysig_t) -1; |
| 222 | if (osa.sa_handler != act) { |
| 223 | memset(&sa, 0, sizeof(sa)); |
| 224 | sigemptyset(&sa.sa_mask); |
| 225 | sa.sa_flags = 0; |
| 226 | #ifdef SA_INTERRUPT |
| 227 | if (sig == SIGALRM) |
| 228 | sa.sa_flags |= SA_INTERRUPT; |
| 229 | #endif |
| 230 | sa.sa_handler = act; |
| 231 | if (sigaction(sig, &sa, NULL) == -1) |
| 232 | return (mysig_t) -1; |
| 233 | } |
| 234 | return (osa.sa_handler); |
| 235 | #else |
| 236 | #undef signal |
| 237 | return (signal(sig, act)); |
| 238 | #endif |
| 239 | } |
| 240 | |
| 241 | #ifndef HAVE_STRDUP |
| 242 | char * |
| 243 | strdup(const char *str) |
| 244 | { |
| 245 | size_t len; |
| 246 | char *cp; |
| 247 | |
| 248 | len = strlen(str) + 1; |
| 249 | cp = malloc(len); |
| 250 | if (cp != NULL) |
| 251 | return(memcpy(cp, str, len)); |
| 252 | return NULL; |
| 253 | } |
| 254 | #endif |
| 255 | |
| 256 | #ifndef HAVE_ISBLANK |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 257 | int |
| 258 | isblank(int c) |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 259 | { |
| 260 | return (c == ' ' || c == '\t'); |
| 261 | } |
| 262 | #endif |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 263 | |
| 264 | #ifndef HAVE_GETPGID |
| 265 | pid_t |
| 266 | getpgid(pid_t pid) |
| 267 | { |
| 268 | #if defined(HAVE_GETPGRP) && !defined(GETPGRP_VOID) |
| 269 | return getpgrp(pid); |
| 270 | #elif defined(HAVE_GETPGRP) |
| 271 | if (pid == 0) |
| 272 | return getpgrp(); |
| 273 | #endif |
| 274 | |
| 275 | errno = ESRCH; |
| 276 | return -1; |
| 277 | } |
| 278 | #endif |