| 1 |
/* Copyright 1988,1990,1993,1994 by Paul Vixie
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| 2 |
* All rights reserved
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| 3 |
*
|
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* Distribute freely, except: don't remove my name from the source or
|
| 5 |
* documentation (don't take credit for my work), mark your changes (don't
|
| 6 |
* get me blamed for your possible bugs), don't alter or remove this
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* notice. May be sold if buildable source is provided to buyer. No
|
| 8 |
* warrantee of any kind, express or implied, is included with this
|
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* software; use at your own risk, responsibility for damages (if any) to
|
| 10 |
* anyone resulting from the use of this software rests entirely with the
|
| 11 |
* user.
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*
|
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* Send bug reports, bug fixes, enhancements, requests, flames, etc., and
|
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* I'll try to keep a version up to date. I can be reached as follows:
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| 15 |
* Paul Vixie <paul@vix.com> uunet!decwrl!vixie!paul
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| 16 |
*/
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| 18 |
#if !defined(lint) && !defined(LINT)
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| 19 |
static char rcsid[] = "$Id: misc.c,v 2.9 1994/01/15 20:43:43 vixie Exp $";
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#endif
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| 22 |
/* vix 26jan87 [RCS has the rest of the log]
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* vix 30dec86 [written]
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*/
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| 25 |
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| 26 |
|
| 27 |
#include "cron.h"
|
| 28 |
#if SYS_TIME_H
|
| 29 |
# include <sys/time.h>
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| 30 |
#else
|
| 31 |
# include <time.h>
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| 32 |
#endif
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| 33 |
#include <sys/file.h>
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| 34 |
#include <sys/stat.h>
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| 35 |
#include <errno.h>
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| 36 |
#include <string.h>
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| 37 |
#include <fcntl.h>
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| 38 |
#if defined(SYSLOG)
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| 39 |
# include <syslog.h>
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| 40 |
#endif
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| 41 |
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| 42 |
|
| 43 |
#if defined(LOG_DAEMON) && !defined(LOG_CRON)
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| 44 |
#define LOG_CRON LOG_DAEMON
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| 45 |
#endif
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| 46 |
|
| 47 |
|
| 48 |
static int LogFD = ERR;
|
| 49 |
|
| 50 |
|
| 51 |
int
|
| 52 |
strcmp_until(left, right, until)
|
| 53 |
char *left;
|
| 54 |
char *right;
|
| 55 |
int until;
|
| 56 |
{
|
| 57 |
register int diff;
|
| 58 |
|
| 59 |
while (*left && *left != until && *left == *right) {
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| 60 |
left++;
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| 61 |
right++;
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| 62 |
}
|
| 63 |
|
| 64 |
if ((*left=='\0' || *left == until) &&
|
| 65 |
(*right=='\0' || *right == until)) {
|
| 66 |
diff = 0;
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| 67 |
} else {
|
| 68 |
diff = *left - *right;
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| 69 |
}
|
| 70 |
|
| 71 |
return diff;
|
| 72 |
}
|
| 73 |
|
| 74 |
|
| 75 |
/* strdtb(s) - delete trailing blanks in string 's' and return new length
|
| 76 |
*/
|
| 77 |
int
|
| 78 |
strdtb(s)
|
| 79 |
char *s;
|
| 80 |
{
|
| 81 |
char *x = s;
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| 82 |
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| 83 |
/* scan forward to the null
|
| 84 |
*/
|
| 85 |
while (*x)
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x++;
|
| 87 |
|
| 88 |
/* scan backward to either the first character before the string,
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| 89 |
* or the last non-blank in the string, whichever comes first.
|
| 90 |
*/
|
| 91 |
do {x--;}
|
| 92 |
while (x >= s && isspace(*x));
|
| 93 |
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| 94 |
/* one character beyond where we stopped above is where the null
|
| 95 |
* goes.
|
| 96 |
*/
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| 97 |
*++x = '\0';
|
| 98 |
|
| 99 |
/* the difference between the position of the null character and
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* the position of the first character of the string is the length.
|
| 101 |
*/
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| 102 |
return x - s;
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| 103 |
}
|
| 104 |
|
| 105 |
|
| 106 |
int
|
| 107 |
set_debug_flags(flags)
|
| 108 |
char *flags;
|
| 109 |
{
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| 110 |
/* debug flags are of the form flag[,flag ...]
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*
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| 112 |
* if an error occurs, print a message to stdout and return FALSE.
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| 113 |
* otherwise return TRUE after setting ERROR_FLAGS.
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*/
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| 115 |
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| 116 |
#if !DEBUGGING
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| 118 |
printf("this program was compiled without debugging enabled\n");
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| 119 |
return FALSE;
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| 120 |
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| 121 |
#else /* DEBUGGING */
|
| 122 |
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| 123 |
char *pc = flags;
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| 124 |
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| 125 |
DebugFlags = 0;
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| 126 |
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| 127 |
while (*pc) {
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| 128 |
char **test;
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| 129 |
int mask;
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| 130 |
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| 131 |
/* try to find debug flag name in our list.
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| 132 |
*/
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| 133 |
for ( test = DebugFlagNames, mask = 1;
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| 134 |
*test && strcmp_until(*test, pc, ',');
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test++, mask <<= 1
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)
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;
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| 138 |
|
| 139 |
if (!*test) {
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| 140 |
fprintf(stderr,
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| 141 |
"unrecognized debug flag <%s> <%s>\n",
|
| 142 |
flags, pc);
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| 143 |
return FALSE;
|
| 144 |
}
|
| 145 |
|
| 146 |
DebugFlags |= mask;
|
| 147 |
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| 148 |
/* skip to the next flag
|
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*/
|
| 150 |
while (*pc && *pc != ',')
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pc++;
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| 152 |
if (*pc == ',')
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| 153 |
pc++;
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| 154 |
}
|
| 155 |
|
| 156 |
if (DebugFlags) {
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| 157 |
int flag;
|
| 158 |
|
| 159 |
fprintf(stderr, "debug flags enabled:");
|
| 160 |
|
| 161 |
for (flag = 0; DebugFlagNames[flag]; flag++)
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| 162 |
if (DebugFlags & (1 << flag))
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| 163 |
fprintf(stderr, " %s", DebugFlagNames[flag]);
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fprintf(stderr, "\n");
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}
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return TRUE;
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#endif /* DEBUGGING */
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}
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| 173 |
void
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set_cron_uid()
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| 175 |
{
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| 176 |
#if defined(BSD) || defined(POSIX)
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| 177 |
if (seteuid(ROOT_UID) < OK) {
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| 178 |
perror("seteuid");
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| 179 |
exit(ERROR_EXIT);
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| 180 |
}
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| 181 |
#else
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| 182 |
if (setuid(ROOT_UID) < OK) {
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| 183 |
perror("setuid");
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| 184 |
exit(ERROR_EXIT);
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| 185 |
}
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| 186 |
#endif
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| 187 |
}
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| 189 |
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| 190 |
void
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| 191 |
set_cron_cwd()
|
| 192 |
{
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| 193 |
struct stat sb;
|
| 194 |
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| 195 |
/* first check for CRONDIR ("/var/cron" or some such)
|
| 196 |
*/
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| 197 |
if (stat(CRONDIR, &sb) < OK && errno == ENOENT) {
|
| 198 |
perror(CRONDIR);
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| 199 |
if (OK == mkdir(CRONDIR, 0700)) {
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| 200 |
fprintf(stderr, "%s: created\n", CRONDIR);
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| 201 |
stat(CRONDIR, &sb);
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| 202 |
} else {
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| 203 |
fprintf(stderr, "%s: ", CRONDIR);
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| 204 |
perror("mkdir");
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| 205 |
exit(ERROR_EXIT);
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| 206 |
}
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| 207 |
}
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| 208 |
if (!(sb.st_mode & S_IFDIR)) {
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| 209 |
fprintf(stderr, "'%s' is not a directory, bailing out.\n",
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CRONDIR);
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| 211 |
exit(ERROR_EXIT);
|
| 212 |
}
|
| 213 |
if (chdir(CRONDIR) < OK) {
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| 214 |
fprintf(stderr, "cannot chdir(%s), bailing out.\n", CRONDIR);
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| 215 |
perror(CRONDIR);
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| 216 |
exit(ERROR_EXIT);
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| 217 |
}
|
| 218 |
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| 219 |
/* CRONDIR okay (now==CWD), now look at SPOOL_DIR ("tabs" or some such)
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| 220 |
*/
|
| 221 |
if (stat(SPOOL_DIR, &sb) < OK && errno == ENOENT) {
|
| 222 |
perror(SPOOL_DIR);
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| 223 |
if (OK == mkdir(SPOOL_DIR, 0700)) {
|
| 224 |
fprintf(stderr, "%s: created\n", SPOOL_DIR);
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| 225 |
stat(SPOOL_DIR, &sb);
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| 226 |
} else {
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| 227 |
fprintf(stderr, "%s: ", SPOOL_DIR);
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| 228 |
perror("mkdir");
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| 229 |
exit(ERROR_EXIT);
|
| 230 |
}
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| 231 |
}
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| 232 |
if (!(sb.st_mode & S_IFDIR)) {
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| 233 |
fprintf(stderr, "'%s' is not a directory, bailing out.\n",
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| 234 |
SPOOL_DIR);
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| 235 |
exit(ERROR_EXIT);
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| 236 |
}
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| 237 |
}
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| 238 |
|
| 239 |
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| 240 |
/* acquire_daemonlock() - write our PID into /etc/cron.pid, unless
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| 241 |
* another daemon is already running, which we detect here.
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| 242 |
*
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| 243 |
* note: main() calls us twice; once before forking, once after.
|
| 244 |
* we maintain static storage of the file pointer so that we
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| 245 |
* can rewrite our PID into the PIDFILE after the fork.
|
| 246 |
*
|
| 247 |
* it would be great if fflush() disassociated the file buffer.
|
| 248 |
*/
|
| 249 |
void
|
| 250 |
acquire_daemonlock(closeflag)
|
| 251 |
int closeflag;
|
| 252 |
{
|
| 253 |
static FILE *fp = NULL;
|
| 254 |
|
| 255 |
if (closeflag && fp) {
|
| 256 |
fclose(fp);
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| 257 |
fp = NULL;
|
| 258 |
return;
|
| 259 |
}
|
| 260 |
|
| 261 |
if (!fp) {
|
| 262 |
char pidfile[MAX_FNAME];
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| 263 |
char buf[MAX_TEMPSTR];
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| 264 |
int fd, otherpid;
|
| 265 |
|
| 266 |
(void) snprintf(pidfile, MAX_FNAME, PIDFILE, PIDDIR);
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| 267 |
if ((-1 == (fd = open(pidfile, O_RDWR|O_CREAT, 0644)))
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| 268 |
|| (NULL == (fp = fdopen(fd, "r+")))
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| 269 |
) {
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| 270 |
snprintf(buf, MAX_TEMPSTR, "can't open or create %s: %s",
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| 271 |
pidfile, strerror(errno));
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| 272 |
fprintf(stderr, "%s: %s\n", ProgramName, buf);
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| 273 |
log_it("CRON", getpid(), "DEATH", buf);
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| 274 |
exit(ERROR_EXIT);
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| 275 |
}
|
| 276 |
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| 277 |
if (flock(fd, LOCK_EX|LOCK_NB) < OK) {
|
| 278 |
int save_errno = errno;
|
| 279 |
|
| 280 |
fscanf(fp, "%d", &otherpid);
|
| 281 |
snprintf(buf, MAX_TEMPSTR, "can't lock %s, otherpid may be %d: %s",
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| 282 |
pidfile, otherpid, strerror(save_errno));
|
| 283 |
fprintf(stderr, "%s: %s\n", ProgramName, buf);
|
| 284 |
log_it("CRON", getpid(), "DEATH", buf);
|
| 285 |
exit(ERROR_EXIT);
|
| 286 |
}
|
| 287 |
snprintf(buf, MAX_TEMPSTR, "pidfile fd = %d", fd);
|
| 288 |
log_it("CRON", getpid(), "INFO", buf);
|
| 289 |
(void) fcntl(fd, F_SETFD, 1);
|
| 290 |
}
|
| 291 |
|
| 292 |
rewind(fp);
|
| 293 |
fprintf(fp, "%d\n", getpid());
|
| 294 |
fflush(fp);
|
| 295 |
(void) ftruncate(fileno(fp), ftell(fp));
|
| 296 |
|
| 297 |
/* abandon fd and fp even though the file is open. we need to
|
| 298 |
* keep it open and locked, but we don't need the handles elsewhere.
|
| 299 |
*/
|
| 300 |
|
| 301 |
}
|
| 302 |
|
| 303 |
/* get_char(file) : like getc() but increment LineNumber on newlines
|
| 304 |
*/
|
| 305 |
int
|
| 306 |
get_char(file)
|
| 307 |
FILE *file;
|
| 308 |
{
|
| 309 |
int ch;
|
| 310 |
|
| 311 |
ch = getc(file);
|
| 312 |
if (ch == '\n')
|
| 313 |
Set_LineNum(LineNumber + 1);
|
| 314 |
return ch;
|
| 315 |
}
|
| 316 |
|
| 317 |
|
| 318 |
/* unget_char(ch, file) : like ungetc but do LineNumber processing
|
| 319 |
*/
|
| 320 |
void
|
| 321 |
unget_char(ch, file)
|
| 322 |
int ch;
|
| 323 |
FILE *file;
|
| 324 |
{
|
| 325 |
ungetc(ch, file);
|
| 326 |
if (ch == '\n')
|
| 327 |
Set_LineNum(LineNumber - 1);
|
| 328 |
}
|
| 329 |
|
| 330 |
|
| 331 |
/* get_string(str, max, file, termstr) : like fgets() but
|
| 332 |
* (1) has terminator string which should include \n
|
| 333 |
* (2) will always leave room for the null
|
| 334 |
* (3) uses get_char() so LineNumber will be accurate
|
| 335 |
* (4) returns EOF or terminating character, whichever
|
| 336 |
*/
|
| 337 |
int
|
| 338 |
get_string(string, size, file, terms)
|
| 339 |
char *string;
|
| 340 |
int size;
|
| 341 |
FILE *file;
|
| 342 |
char *terms;
|
| 343 |
{
|
| 344 |
int ch;
|
| 345 |
|
| 346 |
while (EOF != (ch = get_char(file)) && !strchr(terms, ch)) {
|
| 347 |
if (size > 1) {
|
| 348 |
*string++ = (char) ch;
|
| 349 |
size--;
|
| 350 |
}
|
| 351 |
}
|
| 352 |
|
| 353 |
if (size > 0)
|
| 354 |
*string = '\0';
|
| 355 |
|
| 356 |
return ch;
|
| 357 |
}
|
| 358 |
|
| 359 |
|
| 360 |
/* skip_comments(file) : read past comment (if any)
|
| 361 |
*/
|
| 362 |
void
|
| 363 |
skip_comments(file)
|
| 364 |
FILE *file;
|
| 365 |
{
|
| 366 |
int ch;
|
| 367 |
|
| 368 |
while (EOF != (ch = get_char(file))) {
|
| 369 |
/* ch is now the first character of a line.
|
| 370 |
*/
|
| 371 |
|
| 372 |
while (ch == ' ' || ch == '\t')
|
| 373 |
ch = get_char(file);
|
| 374 |
|
| 375 |
if (ch == EOF)
|
| 376 |
break;
|
| 377 |
|
| 378 |
/* ch is now the first non-blank character of a line.
|
| 379 |
*/
|
| 380 |
|
| 381 |
if (ch != '\n' && ch != '#')
|
| 382 |
break;
|
| 383 |
|
| 384 |
/* ch must be a newline or comment as first non-blank
|
| 385 |
* character on a line.
|
| 386 |
*/
|
| 387 |
|
| 388 |
while (ch != '\n' && ch != EOF)
|
| 389 |
ch = get_char(file);
|
| 390 |
|
| 391 |
/* ch is now the newline of a line which we're going to
|
| 392 |
* ignore.
|
| 393 |
*/
|
| 394 |
}
|
| 395 |
if (ch != EOF)
|
| 396 |
unget_char(ch, file);
|
| 397 |
}
|
| 398 |
|
| 399 |
|
| 400 |
/* int in_file(char *string, FILE *file)
|
| 401 |
* return TRUE if one of the lines in file matches string exactly,
|
| 402 |
* FALSE otherwise.
|
| 403 |
*/
|
| 404 |
static int
|
| 405 |
in_file(string, file)
|
| 406 |
char *string;
|
| 407 |
FILE *file;
|
| 408 |
{
|
| 409 |
char line[MAX_TEMPSTR];
|
| 410 |
|
| 411 |
rewind(file);
|
| 412 |
while (fgets(line, MAX_TEMPSTR, file)) {
|
| 413 |
if (line[0] != '\0')
|
| 414 |
line[strlen(line)-1] = '\0';
|
| 415 |
if (0 == strcmp(line, string))
|
| 416 |
return TRUE;
|
| 417 |
}
|
| 418 |
return FALSE;
|
| 419 |
}
|
| 420 |
|
| 421 |
|
| 422 |
/* int allowed(char *username)
|
| 423 |
* returns TRUE if (ALLOW_FILE exists and user is listed)
|
| 424 |
* or (DENY_FILE exists and user is NOT listed)
|
| 425 |
* or (neither file exists but user=="root" so it's okay)
|
| 426 |
*/
|
| 427 |
int
|
| 428 |
allowed(username)
|
| 429 |
char *username;
|
| 430 |
{
|
| 431 |
static int init = FALSE;
|
| 432 |
static FILE *allow, *deny;
|
| 433 |
|
| 434 |
if (!init) {
|
| 435 |
init = TRUE;
|
| 436 |
#if defined(ALLOW_FILE) && defined(DENY_FILE)
|
| 437 |
allow = fopen(ALLOW_FILE, "r");
|
| 438 |
deny = fopen(DENY_FILE, "r");
|
| 439 |
Debug(DMISC, ("allow/deny enabled, %d/%d\n", !!allow, !!deny))
|
| 440 |
#else
|
| 441 |
allow = NULL;
|
| 442 |
deny = NULL;
|
| 443 |
#endif
|
| 444 |
}
|
| 445 |
|
| 446 |
if (allow)
|
| 447 |
return (in_file(username, allow));
|
| 448 |
if (deny)
|
| 449 |
return (!in_file(username, deny));
|
| 450 |
|
| 451 |
#if defined(ALLOW_ONLY_ROOT)
|
| 452 |
return (strcmp(username, ROOT_USER) == 0);
|
| 453 |
#else
|
| 454 |
return TRUE;
|
| 455 |
#endif
|
| 456 |
}
|
| 457 |
|
| 458 |
|
| 459 |
void
|
| 460 |
log_it(username, xpid, event, detail)
|
| 461 |
char *username;
|
| 462 |
int xpid;
|
| 463 |
char *event;
|
| 464 |
char *detail;
|
| 465 |
{
|
| 466 |
#if defined(LOG_FILE)
|
| 467 |
PID_T pid = xpid;
|
| 468 |
char *msg;
|
| 469 |
TIME_T now = time((TIME_T) 0);
|
| 470 |
register struct tm *t = localtime(&now);
|
| 471 |
int msg_size;
|
| 472 |
#endif /*LOG_FILE*/
|
| 473 |
|
| 474 |
|
| 475 |
#if defined(LOG_FILE)
|
| 476 |
/* we assume that MAX_TEMPSTR will hold the date, time, &punctuation.
|
| 477 |
*/
|
| 478 |
msg_size = strlen(username) + strlen(event) + strlen(detail) + MAX_TEMPSTR;
|
| 479 |
msg = malloc(msg_size);
|
| 480 |
if (msg == NULL) {
|
| 481 |
/* damn, out of mem and we did not test that before... */
|
| 482 |
fprintf(stderr, "%s: Run OUT OF MEMORY while %s\n",
|
| 483 |
ProgramName, __FUNCTION__);
|
| 484 |
return;
|
| 485 |
}
|
| 486 |
if (LogFD < OK) {
|
| 487 |
LogFD = open(LOG_FILE, O_WRONLY|O_APPEND|O_CREAT, 0600);
|
| 488 |
if (LogFD < OK) {
|
| 489 |
fprintf(stderr, "%s: can't open log file\n",
|
| 490 |
ProgramName);
|
| 491 |
perror(LOG_FILE);
|
| 492 |
} else {
|
| 493 |
(void) fcntl(LogFD, F_SETFD, 1);
|
| 494 |
}
|
| 495 |
}
|
| 496 |
|
| 497 |
/* we have to snprintf() it because fprintf() doesn't always write
|
| 498 |
* everything out in one chunk and this has to be atomically appended
|
| 499 |
* to the log file.
|
| 500 |
*/
|
| 501 |
snprintf(msg, msg_size, "%s (%02d/%02d-%02d:%02d:%02d-%d) %s (%s)\n",
|
| 502 |
username,
|
| 503 |
t->tm_mon+1, t->tm_mday, t->tm_hour, t->tm_min, t->tm_sec, pid,
|
| 504 |
event, detail);
|
| 505 |
|
| 506 |
/* we have to run strlen() because snprintf() returns (char*) on old BSD
|
| 507 |
*/
|
| 508 |
if (LogFD < OK || write(LogFD, msg, strlen(msg)) < OK) {
|
| 509 |
if (LogFD >= OK)
|
| 510 |
perror(LOG_FILE);
|
| 511 |
fprintf(stderr, "%s: can't write to log file\n", ProgramName);
|
| 512 |
write(STDERR, msg, strlen(msg));
|
| 513 |
}
|
| 514 |
|
| 515 |
free(msg);
|
| 516 |
#endif /*LOG_FILE*/
|
| 517 |
|
| 518 |
#if defined(SYSLOG)
|
| 519 |
|
| 520 |
|
| 521 |
/* we don't use LOG_PID since the pid passed to us by
|
| 522 |
* our client may not be our own. therefore we want to
|
| 523 |
* print the pid ourselves.
|
| 524 |
*/
|
| 525 |
/* SteveG says: That comment is not consistent with the
|
| 526 |
code, and makes no sense -- I suspect it's a remnant
|
| 527 |
of a cut-n-paster... */
|
| 528 |
# ifdef LOG_CRON
|
| 529 |
openlog(ProgramName, LOG_PID, LOG_CRON);
|
| 530 |
# else
|
| 531 |
openlog(ProgramName, LOG_PID);
|
| 532 |
# endif
|
| 533 |
|
| 534 |
syslog(LOG_INFO, "(%s) %s (%s)", username, event, detail);
|
| 535 |
|
| 536 |
closelog();
|
| 537 |
#endif /*SYSLOG*/
|
| 538 |
|
| 539 |
#if DEBUGGING
|
| 540 |
if (DebugFlags) {
|
| 541 |
fprintf(stderr, "log_it: (%s %d) %s (%s)\n",
|
| 542 |
username, xpid, event, detail);
|
| 543 |
}
|
| 544 |
#endif
|
| 545 |
}
|
| 546 |
|
| 547 |
|
| 548 |
void
|
| 549 |
log_close() {
|
| 550 |
#if defined(LOG_FILE)
|
| 551 |
if (LogFD != ERR) {
|
| 552 |
close(LogFD);
|
| 553 |
LogFD = ERR;
|
| 554 |
}
|
| 555 |
#endif
|
| 556 |
#if defined(SYSLOG)
|
| 557 |
closelog();
|
| 558 |
#endif
|
| 559 |
}
|
| 560 |
|
| 561 |
|
| 562 |
/* two warnings:
|
| 563 |
* (1) this routine is fairly slow
|
| 564 |
* (2) it returns a pointer to static storage
|
| 565 |
*/
|
| 566 |
char *
|
| 567 |
first_word(s, t)
|
| 568 |
register char *s; /* string we want the first word of */
|
| 569 |
register char *t; /* terminators, implicitly including \0 */
|
| 570 |
{
|
| 571 |
static char retbuf[2][MAX_TEMPSTR + 1]; /* sure wish C had GC */
|
| 572 |
static int retsel = 0;
|
| 573 |
register char *rb, *rp;
|
| 574 |
|
| 575 |
/* select a return buffer */
|
| 576 |
retsel = 1-retsel;
|
| 577 |
rb = &retbuf[retsel][0];
|
| 578 |
rp = rb;
|
| 579 |
|
| 580 |
/* skip any leading terminators */
|
| 581 |
while (*s && (NULL != strchr(t, *s))) {
|
| 582 |
s++;
|
| 583 |
}
|
| 584 |
|
| 585 |
/* copy until next terminator or full buffer */
|
| 586 |
while (*s && (NULL == strchr(t, *s)) && (rp < &rb[MAX_TEMPSTR])) {
|
| 587 |
*rp++ = *s++;
|
| 588 |
}
|
| 589 |
|
| 590 |
/* finish the return-string and return it */
|
| 591 |
*rp = '\0';
|
| 592 |
return rb;
|
| 593 |
}
|
| 594 |
|
| 595 |
|
| 596 |
/* warning:
|
| 597 |
* heavily ascii-dependent.
|
| 598 |
*/
|
| 599 |
void
|
| 600 |
mkprint(dst, src, len)
|
| 601 |
register char *dst;
|
| 602 |
register unsigned char *src;
|
| 603 |
register int len;
|
| 604 |
{
|
| 605 |
while (len-- > 0)
|
| 606 |
{
|
| 607 |
register unsigned char ch = *src++;
|
| 608 |
|
| 609 |
if (ch < ' ') { /* control character */
|
| 610 |
*dst++ = '^';
|
| 611 |
*dst++ = ch + '@';
|
| 612 |
} else if (ch < 0177) { /* printable */
|
| 613 |
*dst++ = ch;
|
| 614 |
} else if (ch == 0177) { /* delete/rubout */
|
| 615 |
*dst++ = '^';
|
| 616 |
*dst++ = '?';
|
| 617 |
} else { /* parity character */
|
| 618 |
/* well, the following snprintf is paranoid, but that will
|
| 619 |
* keep grep happy */
|
| 620 |
snprintf(dst, 5, "\\%03o", ch);
|
| 621 |
dst += 4;
|
| 622 |
}
|
| 623 |
}
|
| 624 |
*dst = '\0';
|
| 625 |
}
|
| 626 |
|
| 627 |
|
| 628 |
/* warning:
|
| 629 |
* returns a pointer to malloc'd storage, you must call free yourself.
|
| 630 |
*/
|
| 631 |
char *
|
| 632 |
mkprints(src, len)
|
| 633 |
register unsigned char *src;
|
| 634 |
register unsigned int len;
|
| 635 |
{
|
| 636 |
register char *dst = malloc(len*4 + 1);
|
| 637 |
|
| 638 |
if (dst)
|
| 639 |
mkprint(dst, src, len);
|
| 640 |
|
| 641 |
return dst;
|
| 642 |
}
|
| 643 |
|
| 644 |
|
| 645 |
#ifdef MAIL_DATE
|
| 646 |
/* Sat, 27 Feb 1993 11:44:51 -0800 (CST)
|
| 647 |
* 1234567890123456789012345678901234567
|
| 648 |
*/
|
| 649 |
char *
|
| 650 |
arpadate(clock)
|
| 651 |
time_t *clock;
|
| 652 |
{
|
| 653 |
static char ret[64]; /* zone name might be >3 chars */
|
| 654 |
time_t t = clock ? *clock : time(NULL);
|
| 655 |
struct tm *tm = localtime(&t);
|
| 656 |
char *qmark;
|
| 657 |
size_t len;
|
| 658 |
int hours = tm->tm_gmtoff / 3600;
|
| 659 |
int minutes = (tm->tm_gmtoff - (hours * 3600)) / 60;
|
| 660 |
|
| 661 |
if (minutes < 0)
|
| 662 |
minutes = -minutes;
|
| 663 |
|
| 664 |
/* Defensive coding (almost) never hurts... */
|
| 665 |
len = strftime(ret, sizeof(ret), "%a, %e %b %Y %T ????? (%Z)", tm);
|
| 666 |
if (len == 0) {
|
| 667 |
ret[0] = '?';
|
| 668 |
ret[1] = '\0';
|
| 669 |
return ret;
|
| 670 |
}
|
| 671 |
qmark = strchr(ret, '?');
|
| 672 |
if (qmark && len - (qmark - ret) >= 6) {
|
| 673 |
snprintf(qmark, 6, "% .2d%.2d", hours, minutes);
|
| 674 |
qmark[5] = ' ';
|
| 675 |
}
|
| 676 |
return ret;
|
| 677 |
}
|
| 678 |
#endif /*MAIL_DATE*/
|
| 679 |
|
| 680 |
|
| 681 |
#ifdef HAVE_SAVED_UIDS
|
| 682 |
static uid_t save_euid, save_egid;
|
| 683 |
int swap_uids()
|
| 684 |
{
|
| 685 |
save_euid = geteuid(); save_egid = getegid();
|
| 686 |
return (setegid(getgid()) || seteuid(getuid())) ? -1 : 0;
|
| 687 |
}
|
| 688 |
int swap_uids_back()
|
| 689 |
{
|
| 690 |
return (setegid(save_egid) || seteuid(save_euid)) ? -1 : 0;
|
| 691 |
}
|
| 692 |
#else /*HAVE_SAVED_UIDS*/
|
| 693 |
int swap_uids()
|
| 694 |
{
|
| 695 |
return (setregid(getegid(), getgid()) || setreuid(geteuid(), getuid()))
|
| 696 |
? -1 : 0;
|
| 697 |
}
|
| 698 |
int swap_uids_back() { return swap_uids(); }
|
| 699 |
#endif /*HAVE_SAVED_UIDS*/
|
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