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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> | |
31 | #include <unistd.h> | |
32 | ||
33 | #include "xmalloc.h" | |
34 | ||
35 | #ifndef HAVE___PROGNAME | |
36 | char *__progname; | |
37 | #endif | |
38 | ||
39 | /* | |
40 | * NB. duplicate __progname in case it is an alias for argv[0] | |
41 | * Otherwise it may get clobbered by setproctitle() | |
42 | */ | |
43 | char *ssh_get_progname(char *argv0) | |
44 | { | |
45 | #ifdef HAVE___PROGNAME | |
46 | extern char *__progname; | |
47 | ||
48 | return xstrdup(__progname); | |
49 | #else | |
50 | char *p; | |
51 | ||
52 | if (argv0 == NULL) | |
53 | return ("unknown"); /* XXX */ | |
54 | p = strrchr(argv0, '/'); | |
55 | if (p == NULL) | |
56 | p = argv0; | |
57 | else | |
58 | p++; | |
59 | ||
60 | return (xstrdup(p)); | |
61 | #endif | |
62 | } | |
63 | ||
64 | #ifndef HAVE_SETLOGIN | |
65 | int setlogin(const char *name) | |
66 | { | |
67 | return (0); | |
68 | } | |
69 | #endif /* !HAVE_SETLOGIN */ | |
70 | ||
71 | #ifndef HAVE_INNETGR | |
72 | int innetgr(const char *netgroup, const char *host, | |
73 | const char *user, const char *domain) | |
74 | { | |
75 | return (0); | |
76 | } | |
77 | #endif /* HAVE_INNETGR */ | |
78 | ||
79 | #if !defined(HAVE_SETEUID) && defined(HAVE_SETREUID) | |
80 | int seteuid(uid_t euid) | |
81 | { | |
82 | return (setreuid(-1, euid)); | |
83 | } | |
84 | #endif /* !defined(HAVE_SETEUID) && defined(HAVE_SETREUID) */ | |
85 | ||
86 | #if !defined(HAVE_SETEGID) && defined(HAVE_SETRESGID) | |
87 | int setegid(uid_t egid) | |
88 | { | |
89 | return(setresgid(-1, egid, -1)); | |
90 | } | |
91 | #endif /* !defined(HAVE_SETEGID) && defined(HAVE_SETRESGID) */ | |
92 | ||
93 | #if !defined(HAVE_STRERROR) && defined(HAVE_SYS_ERRLIST) && defined(HAVE_SYS_NERR) | |
94 | const char *strerror(int e) | |
95 | { | |
96 | extern int sys_nerr; | |
97 | extern char *sys_errlist[]; | |
98 | ||
99 | if ((e >= 0) && (e < sys_nerr)) | |
100 | return (sys_errlist[e]); | |
101 | ||
102 | return ("unlisted error"); | |
103 | } | |
104 | #endif | |
105 | ||
106 | #ifndef HAVE_UTIMES | |
107 | int utimes(char *filename, struct timeval *tvp) | |
108 | { | |
109 | struct utimbuf ub; | |
110 | ||
111 | ub.actime = tvp[0].tv_sec; | |
112 | ub.modtime = tvp[1].tv_sec; | |
113 | ||
114 | return (utime(filename, &ub)); | |
115 | } | |
116 | #endif | |
117 | ||
118 | #ifndef HAVE_TRUNCATE | |
119 | int truncate(const char *path, off_t length) | |
120 | { | |
121 | int fd, ret, saverrno; | |
122 | ||
123 | fd = open(path, O_WRONLY); | |
124 | if (fd < 0) | |
125 | return (-1); | |
126 | ||
127 | ret = ftruncate(fd, length); | |
128 | saverrno = errno; | |
129 | close(fd); | |
130 | if (ret == -1) | |
131 | errno = saverrno; | |
132 | ||
133 | return(ret); | |
134 | } | |
135 | #endif /* HAVE_TRUNCATE */ | |
136 | ||
137 | #if !defined(HAVE_NANOSLEEP) && !defined(HAVE_NSLEEP) | |
138 | int nanosleep(const struct timespec *req, struct timespec *rem) | |
139 | { | |
140 | int rc, saverrno; | |
141 | extern int errno; | |
142 | struct timeval tstart, tstop, tremain, time2wait; | |
143 | ||
144 | TIMESPEC_TO_TIMEVAL(&time2wait, req) | |
145 | (void) gettimeofday(&tstart, NULL); | |
146 | rc = select(0, NULL, NULL, NULL, &time2wait); | |
147 | if (rc == -1) { | |
148 | saverrno = errno; | |
149 | (void) gettimeofday (&tstop, NULL); | |
150 | errno = saverrno; | |
151 | tremain.tv_sec = time2wait.tv_sec - | |
152 | (tstop.tv_sec - tstart.tv_sec); | |
153 | tremain.tv_usec = time2wait.tv_usec - | |
154 | (tstop.tv_usec - tstart.tv_usec); | |
155 | tremain.tv_sec += tremain.tv_usec / 1000000L; | |
156 | tremain.tv_usec %= 1000000L; | |
157 | } else { | |
158 | tremain.tv_sec = 0; | |
159 | tremain.tv_usec = 0; | |
160 | } | |
161 | if (rem != NULL) | |
162 | TIMEVAL_TO_TIMESPEC(&tremain, rem) | |
163 | ||
164 | return(rc); | |
165 | } | |
166 | #endif | |
167 | ||
168 | #ifndef HAVE_TCGETPGRP | |
169 | pid_t | |
170 | tcgetpgrp(int fd) | |
171 | { | |
172 | int ctty_pgrp; | |
173 | ||
174 | if (ioctl(fd, TIOCGPGRP, &ctty_pgrp) == -1) | |
175 | return(-1); | |
176 | else | |
177 | return(ctty_pgrp); | |
178 | } | |
179 | #endif /* HAVE_TCGETPGRP */ | |
180 | ||
181 | #ifndef HAVE_TCSENDBREAK | |
182 | int | |
183 | tcsendbreak(int fd, int duration) | |
184 | { | |
185 | # if defined(TIOCSBRK) && defined(TIOCCBRK) | |
186 | struct timeval sleepytime; | |
187 | ||
188 | sleepytime.tv_sec = 0; | |
189 | sleepytime.tv_usec = 400000; | |
190 | if (ioctl(fd, TIOCSBRK, 0) == -1) | |
191 | return (-1); | |
192 | (void)select(0, 0, 0, 0, &sleepytime); | |
193 | if (ioctl(fd, TIOCCBRK, 0) == -1) | |
194 | return (-1); | |
195 | return (0); | |
196 | # else | |
197 | return -1; | |
198 | # endif | |
199 | } | |
200 | #endif /* HAVE_TCSENDBREAK */ | |
201 | ||
202 | mysig_t | |
203 | mysignal(int sig, mysig_t act) | |
204 | { | |
205 | #ifdef HAVE_SIGACTION | |
206 | struct sigaction sa, osa; | |
207 | ||
208 | if (sigaction(sig, NULL, &osa) == -1) | |
209 | return (mysig_t) -1; | |
210 | if (osa.sa_handler != act) { | |
211 | memset(&sa, 0, sizeof(sa)); | |
212 | sigemptyset(&sa.sa_mask); | |
213 | sa.sa_flags = 0; | |
214 | #ifdef SA_INTERRUPT | |
215 | if (sig == SIGALRM) | |
216 | sa.sa_flags |= SA_INTERRUPT; | |
217 | #endif | |
218 | sa.sa_handler = act; | |
219 | if (sigaction(sig, &sa, NULL) == -1) | |
220 | return (mysig_t) -1; | |
221 | } | |
222 | return (osa.sa_handler); | |
223 | #else | |
224 | #undef signal | |
225 | return (signal(sig, act)); | |
226 | #endif | |
227 | } | |
228 | ||
229 | #ifndef HAVE_STRDUP | |
230 | char * | |
231 | strdup(const char *str) | |
232 | { | |
233 | size_t len; | |
234 | char *cp; | |
235 | ||
236 | len = strlen(str) + 1; | |
237 | cp = malloc(len); | |
238 | if (cp != NULL) | |
239 | return(memcpy(cp, str, len)); | |
240 | return NULL; | |
241 | } | |
242 | #endif |