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httpd shring and logging update, part 1 or 7

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text    data     bss     dec     hex filename
   9836       0       0    9836    266c busybox.t1/networking/httpd.o.orig
   9724       0       0    9724    25fc busybox.t2/networking/httpd.o
   9657       0       0    9657    25b9 busybox.t3/networking/httpd.o
   9342       0       0    9342    247e busybox.t4/networking/httpd.o
   9342       0       0    9342    247e busybox.t5/networking/httpd.o
   9262       0       0    9262    242e busybox.t6/networking/httpd.o
   9283       0       0    9283    2443 busybox.t7/networking/httpd.o
   9334       0       0    9334    2476 busybox.t8/networking/httpd.o
This commit is contained in:
Denis Vlasenko 2007-08-17 19:18:06 +00:00
parent 72d260dbda
commit 1b97efd66a
2 changed files with 102 additions and 28 deletions
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4
include/libbb.h
View File

@ -642,8 +642,8 @@ enum { wrote_pidfile = 0 };
enum {
LOGMODE_NONE = 0,
LOGMODE_STDIO = 1<<0,
LOGMODE_SYSLOG = 1<<1,
LOGMODE_STDIO = (1 << 0),
LOGMODE_SYSLOG = (1 << 1) * ENABLE_FEATURE_SYSLOG,
LOGMODE_BOTH = LOGMODE_SYSLOG + LOGMODE_STDIO,
};
extern const char *msg_eol;

126
libbb/verror_msg.c
View File

@ -7,45 +7,119 @@
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
#include "libbb.h"
#include <syslog.h>
#include "libbb.h"
smallint logmode = LOGMODE_STDIO;
const char *msg_eol = "\n";
void bb_verror_msg(const char *s, va_list p, const char* strerr)
{
/* va_copy is used because it is not portable
* to use va_list p twice */
va_list p2;
va_copy(p2, p);
char *msg;
int applet_len, strerr_len, msgeol_len, used;
if (!logmode)
return;
if (!s) /* nomsg[_and_die] uses NULL fmt */
s = ""; /* some libc don't like printf(NULL) */
used = vasprintf(&msg, s, p);
if (used < 0)
return;
/* This is ugly and costs +60 bytes compared to multiple
* fprintf's, but is guaranteed to do a single write.
* This is needed for e.g. httpd logging, when multiple
* children can produce log messages simultaneously. */
applet_len = strlen(applet_name) + 2; /* "applet: " */
strerr_len = strerr ? strlen(strerr) : 0;
msgeol_len = strlen(msg_eol);
/* +3 is for ": " before strerr and for terminating NUL */
msg = xrealloc(msg, applet_len + used + strerr_len + msgeol_len + 3);
/* TODO: maybe use writev instead of memmoving? Need full_writev? */
memmove(msg + applet_len, msg, used);
used += applet_len;
strcpy(msg, applet_name);
msg[applet_len - 2] = ':';
msg[applet_len - 1] = ' ';
if (strerr) {
msg[used++] = ':';
msg[used++] = ' ';
strcpy(&msg[used], strerr);
used += strerr_len;
}
strcpy(&msg[used], msg_eol);
if (logmode & LOGMODE_STDIO) {
fflush(stdout);
fprintf(stderr, "%s: ", applet_name);
vfprintf(stderr, s, p);
if (!strerr)
fputs(msg_eol, stderr);
else
fprintf(stderr, "%s%s%s",
s[0] ? ": " : "",
strerr, msg_eol);
full_write(2, msg, used + msgeol_len);
}
if (ENABLE_FEATURE_SYSLOG && (logmode & LOGMODE_SYSLOG)) {
if (!strerr)
vsyslog(LOG_ERR, s, p2);
else {
char *msg;
if (vasprintf(&msg, s, p2) < 0) {
fprintf(stderr, "%s: %s\n", applet_name, bb_msg_memory_exhausted);
xfunc_die();
}
syslog(LOG_ERR, "%s: %s", msg, strerr);
free(msg);
}
if (logmode & LOGMODE_SYSLOG) {
syslog(LOG_ERR, "%s", msg + applet_len);
}
va_end(p2);
free(msg);
}
#ifdef VERSION_WITH_WRITEV
/* Code size is approximately the same, but currently it's the only user
* of writev in entire bbox. __libc_writev in uclibc is ~50 bytes. */
void bb_verror_msg(const char *s, va_list p, const char* strerr)
{
int strerr_len, msgeol_len;
struct iovec iov[3];
#define used (iov[2].iov_len)
#define msgv (iov[2].iov_base)
#define msgc ((char*)(iov[2].iov_base))
#define msgptr (&(iov[2].iov_base))
if (!logmode)
return;
if (!s) /* nomsg[_and_die] uses NULL fmt */
s = ""; /* some libc don't like printf(NULL) */
/* Prevent "derefing type-punned ptr will break aliasing rules" */
used = vasprintf((char**)(void*)msgptr, s, p);
if (used < 0)
return;
/* This is ugly and costs +60 bytes compared to multiple
* fprintf's, but is guaranteed to do a single write.
* This is needed for e.g. httpd logging, when multiple
* children can produce log messages simultaneously. */
strerr_len = strerr ? strlen(strerr) : 0;
msgeol_len = strlen(msg_eol);
/* +3 is for ": " before strerr and for terminating NUL */
msgv = xrealloc(msgv, used + strerr_len + msgeol_len + 3);
if (strerr) {
msgc[used++] = ':';
msgc[used++] = ' ';
strcpy(msgc + used, strerr);
used += strerr_len;
}
strcpy(msgc + used, msg_eol);
used += msgeol_len;
if (logmode & LOGMODE_STDIO) {
iov[0].iov_base = (char*)applet_name;
iov[0].iov_len = strlen(applet_name);
iov[1].iov_base = (char*)": ";
iov[1].iov_len = 2;
/*iov[2].iov_base = msgc;*/
/*iov[2].iov_len = used;*/
fflush(stdout);
writev(2, iov, 3);
}
if (logmode & LOGMODE_SYSLOG) {
syslog(LOG_ERR, "%s", msgc);
}
free(msgc);
}
#endif