1 /* vi: set sw=4 ts=4: */
5 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
7 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
13 smallint logmode = LOGMODE_STDIO;
14 const char *msg_eol = "\n";
16 void bb_verror_msg(const char *s, va_list p, const char* strerr)
19 int applet_len, strerr_len, msgeol_len, used;
24 if (!s) /* nomsg[_and_die] uses NULL fmt */
25 s = ""; /* some libc don't like printf(NULL) */
27 used = vasprintf(&msg, s, p);
31 /* This is ugly and costs +60 bytes compared to multiple
32 * fprintf's, but is guaranteed to do a single write.
33 * This is needed for e.g. httpd logging, when multiple
34 * children can produce log messages simultaneously. */
36 applet_len = strlen(applet_name) + 2; /* "applet: " */
37 strerr_len = strerr ? strlen(strerr) : 0;
38 msgeol_len = strlen(msg_eol);
39 /* +3 is for ": " before strerr and for terminating NUL */
40 msg = xrealloc(msg, applet_len + used + strerr_len + msgeol_len + 3);
41 /* TODO: maybe use writev instead of memmoving? Need full_writev? */
42 memmove(msg + applet_len, msg, used);
44 strcpy(msg, applet_name);
45 msg[applet_len - 2] = ':';
46 msg[applet_len - 1] = ' ';
50 strcpy(&msg[used], strerr);
53 strcpy(&msg[used], msg_eol);
55 if (logmode & LOGMODE_STDIO) {
57 full_write(2, msg, used + msgeol_len);
59 if (logmode & LOGMODE_SYSLOG) {
60 syslog(LOG_ERR, "%s", msg + applet_len);
66 #ifdef VERSION_WITH_WRITEV
68 /* Code size is approximately the same, but currently it's the only user
69 * of writev in entire bbox. __libc_writev in uclibc is ~50 bytes. */
71 void bb_verror_msg(const char *s, va_list p, const char* strerr)
73 int strerr_len, msgeol_len;
76 #define used (iov[2].iov_len)
77 #define msgv (iov[2].iov_base)
78 #define msgc ((char*)(iov[2].iov_base))
79 #define msgptr (&(iov[2].iov_base))
84 if (!s) /* nomsg[_and_die] uses NULL fmt */
85 s = ""; /* some libc don't like printf(NULL) */
87 /* Prevent "derefing type-punned ptr will break aliasing rules" */
88 used = vasprintf((char**)(void*)msgptr, s, p);
92 /* This is ugly and costs +60 bytes compared to multiple
93 * fprintf's, but is guaranteed to do a single write.
94 * This is needed for e.g. httpd logging, when multiple
95 * children can produce log messages simultaneously. */
97 strerr_len = strerr ? strlen(strerr) : 0;
98 msgeol_len = strlen(msg_eol);
99 /* +3 is for ": " before strerr and for terminating NUL */
100 msgv = xrealloc(msgv, used + strerr_len + msgeol_len + 3);
104 strcpy(msgc + used, strerr);
107 strcpy(msgc + used, msg_eol);
110 if (logmode & LOGMODE_STDIO) {
111 iov[0].iov_base = (char*)applet_name;
112 iov[0].iov_len = strlen(applet_name);
113 iov[1].iov_base = (char*)": ";
115 /*iov[2].iov_base = msgc;*/
116 /*iov[2].iov_len = used;*/
120 if (logmode & LOGMODE_SYSLOG) {
121 syslog(LOG_ERR, "%s", msgc);