1 /* Based on conf.c from UCB sendmail 8.8.8 */
4 * Copyright 2003 Damien Miller
5 * Copyright (c) 1983, 1995-1997 Eric P. Allman
6 * Copyright (c) 1988, 1993
7 * The Regents of the University of California. All rights reserved.
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10 * modification, are permitted provided that the following conditions
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13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
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17 * 3. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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36 #ifndef HAVE_SETPROCTITLE
40 #ifdef HAVE_SYS_PSTAT_H
41 #include <sys/pstat.h>
45 #define SPT_NONE 0 /* don't use it at all */
46 #define SPT_PSTAT 1 /* use pstat(PSTAT_SETCMD, ...) */
47 #define SPT_REUSEARGV 2 /* cover argv with title information */
50 # define SPT_TYPE SPT_NONE
54 # define SPT_PADCHAR '\0'
57 #if SPT_TYPE == SPT_REUSEARGV
58 static char *argv_start = NULL;
59 static size_t argv_env_len = 0;
62 #endif /* HAVE_SETPROCTITLE */
65 compat_init_setproctitle(int argc, char *argv[])
67 #if defined(SPT_TYPE) && SPT_TYPE == SPT_REUSEARGV
68 extern char **environ;
69 char *lastargv = NULL;
70 char **envp = environ;
74 * NB: This assumes that argv has already been copied out of the
75 * way. This is true for sshd, but may not be true for other
79 if (argc == 0 || argv[0] == NULL)
82 /* Fail if we can't allocate room for the new environment */
83 for (i = 0; envp[i] != NULL; i++)
85 if ((environ = calloc(i + 1, sizeof(*environ))) == NULL) {
86 environ = envp; /* put it back */
91 * Find the last argv string or environment variable within
92 * our process memory area.
94 for (i = 0; i < argc; i++) {
95 if (lastargv == NULL || lastargv + 1 == argv[i])
96 lastargv = argv[i] + strlen(argv[i]);
98 for (i = 0; envp[i] != NULL; i++) {
99 if (lastargv + 1 == envp[i])
100 lastargv = envp[i] + strlen(envp[i]);
104 argv_start = argv[0];
105 argv_env_len = lastargv - argv[0] - 1;
109 * XXX - will truncate env on strdup fail
111 for (i = 0; envp[i] != NULL; i++)
112 environ[i] = strdup(envp[i]);
114 #endif /* SPT_REUSEARGV */
117 #ifndef HAVE_SETPROCTITLE
119 setproctitle(const char *fmt, ...)
121 #if SPT_TYPE != SPT_NONE
125 extern char *__progname;
126 #if SPT_TYPE == SPT_PSTAT
130 #if SPT_TYPE == SPT_REUSEARGV
131 if (argv_env_len <= 0)
135 strlcpy(buf, __progname, sizeof(buf));
139 len = strlcat(buf, ": ", sizeof(buf));
140 if (len < sizeof(buf))
141 vsnprintf(buf + len, sizeof(buf) - len , fmt, ap);
145 #if SPT_TYPE == SPT_PSTAT
146 pst.pst_command = buf;
147 pstat(PSTAT_SETCMD, pst, strlen(buf), 0, 0);
148 #elif SPT_TYPE == SPT_REUSEARGV
149 /* debug("setproctitle: copy \"%s\" into len %d",
150 buf, argv_env_len); */
151 len = strlcpy(argv_start, buf, argv_env_len);
152 for(; len < argv_env_len; len++)
153 argv_start[len] = SPT_PADCHAR;
156 #endif /* SPT_NONE */
159 #endif /* HAVE_SETPROCTITLE */