Annotation of src/usr.bin/sudo/fileops.c, Revision 1.1.1.1.6.1
1.1 millert 1: /*
1.1.1.1.6.1! millert 2: * Copyright (c) 1999, 2001 Todd C. Miller <Todd.Miller@courtesan.com>
1.1 millert 3: * 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: *
9: * 1. Redistributions of source code must retain the above copyright
10: * notice, this list of conditions and the following disclaimer.
11: *
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
15: *
16: * 3. The name of the author may not be used to endorse or promote products
17: * derived from this software without specific prior written permission.
18: *
19: * 4. Products derived from this software may not be called "Sudo" nor
20: * may "Sudo" appear in their names without specific prior written
21: * permission from the author.
22: *
23: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
24: * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
25: * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
26: * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
27: * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
28: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
29: * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
30: * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
31: * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
32: * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33: */
34:
35: #include "config.h"
36:
1.1.1.1.6.1! millert 37: #include <sys/types.h>
! 38: #include <sys/param.h>
! 39: #ifdef HAVE_FLOCK
! 40: # include <sys/file.h>
! 41: #endif /* HAVE_FLOCK */
1.1 millert 42: #include <stdio.h>
43: #ifdef HAVE_UNISTD_H
1.1.1.1.6.1! millert 44: # include <unistd.h>
1.1 millert 45: #endif /* HAVE_UNISTD_H */
46: #include <fcntl.h>
47: #include <time.h>
48: #ifdef HAVE_UTIME
49: # ifdef HAVE_UTIME_H
50: # include <utime.h>
51: # endif /* HAVE_UTIME_H */
52: #else
1.1.1.1.6.1! millert 53: # include "emul/utime.h"
1.1 millert 54: #endif /* HAVE_UTIME */
55:
56: #include "sudo.h"
57:
58: #ifndef lint
1.1.1.1.6.1! millert 59: static const char rcsid[] = "$Sudo: fileops.c,v 1.3 2001/12/14 19:52:47 millert Exp $";
1.1 millert 60: #endif /* lint */
61:
62: /*
63: * Update the access and modify times on a file.
64: */
65: int
66: touch(path, when)
67: char *path;
68: time_t when;
69: {
70: #ifdef HAVE_UTIME_POSIX
71: struct utimbuf ut, *utp;
72:
73: ut.actime = ut.modtime = when;
74: utp = &ut;
75: #else
76: /* BSD <= 4.3 has no struct utimbuf */
77: time_t utp[2];
78:
79: utp[0] = utp[1] = when;
80: #endif /* HAVE_UTIME_POSIX */
81:
82: return(utime(path, utp));
83: }
84:
85: /*
86: * Lock/unlock a file.
87: */
88: #ifdef HAVE_LOCKF
89: int
90: lock_file(fd, lockit)
91: int fd;
92: int lockit;
93: {
94: int op = 0;
95:
96: switch (lockit) {
97: case SUDO_LOCK:
98: op = F_LOCK;
99: break;
100: case SUDO_TLOCK:
101: op = F_TLOCK;
102: break;
103: case SUDO_UNLOCK:
104: op = F_ULOCK;
105: break;
106: }
107: return(lockf(fd, op, 0) == 0);
108: }
109: #elif HAVE_FLOCK
110: int
111: lock_file(fd, lockit)
112: int fd;
113: int lockit;
114: {
115: int op = 0;
116:
117: switch (lockit) {
118: case SUDO_LOCK:
119: op = LOCK_EX;
120: break;
121: case SUDO_TLOCK:
122: op = LOCK_EX | LOCK_NB;
123: break;
124: case SUDO_UNLOCK:
1.1.1.1.6.1! millert 125: op = LOCK_UN;
1.1 millert 126: break;
127: }
128: return(flock(fd, op) == 0);
129: }
130: #else
131: int
132: lock_file(fd, lockit)
133: int fd;
134: int lockit;
135: {
136: #ifdef F_SETLK
137: int func;
138: struct flock lock;
139:
140: lock.l_start = 0;
141: lock.l_len = 0;
142: lock.l_pid = getpid();
143: lock.l_type = (lockit == SUDO_UNLOCK) ? F_UNLCK : F_WRLCK;
144: lock.l_whence = SEEK_SET;
145: func = (lockit == SUDO_TLOCK) ? F_SETLK : F_SETLKW;
146:
147: return(fcntl(fd, func, &lock) == 0);
148: #else
149: return(TRUE);
150: #endif
151: }
152: #endif