Annotation of embedaddon/ntp/libntp/msyslog.c, revision 1.1
1.1 ! misho 1: /*
! 2: * msyslog - either send a message to the terminal or print it on
! 3: * the standard output.
! 4: *
! 5: * Converted to use varargs, much better ... jks
! 6: */
! 7:
! 8: #ifdef HAVE_CONFIG_H
! 9: # include <config.h>
! 10: #endif
! 11:
! 12: #include <sys/types.h>
! 13: #ifdef HAVE_UNISTD_H
! 14: # include <unistd.h>
! 15: #endif
! 16: #include <stdio.h>
! 17:
! 18: #include "ntp.h"
! 19: #include "ntp_string.h"
! 20: #include "ntp_syslog.h"
! 21:
! 22: #ifdef SYS_WINNT
! 23: # include <stdarg.h>
! 24: # include "..\ports\winnt\libntp\messages.h"
! 25: #endif
! 26:
! 27:
! 28: int syslogit = 1;
! 29: int msyslog_term = FALSE; /* duplicate to stdout/err */
! 30: FILE * syslog_file;
! 31:
! 32: u_int32 ntp_syslogmask = ~(u_int32)0; /* libntp default is all lit */
! 33:
! 34: extern char * progname;
! 35:
! 36: /* Declare the local functions */
! 37: void addto_syslog (int, const char *);
! 38: void format_errmsg (char *, size_t, const char *, int);
! 39:
! 40:
! 41: /*
! 42: * This routine adds the contents of a buffer to the syslog or an
! 43: * application-specific logfile.
! 44: */
! 45: void
! 46: addto_syslog(
! 47: int level,
! 48: const char * msg
! 49: )
! 50: {
! 51: static char * prevcall_progname;
! 52: static char * prog;
! 53: const char nl[] = "\n";
! 54: const char empty[] = "";
! 55: FILE * term_file;
! 56: int log_to_term;
! 57: int log_to_file;
! 58: const char * nl_or_empty;
! 59: const char * human_time;
! 60:
! 61: /* setup program basename static var prog if needed */
! 62: if (progname != prevcall_progname) {
! 63: prevcall_progname = progname;
! 64: prog = strrchr(progname, DIR_SEP);
! 65: if (prog != NULL)
! 66: prog++;
! 67: else
! 68: prog = progname;
! 69: }
! 70:
! 71: log_to_term = msyslog_term;
! 72: log_to_file = FALSE;
! 73: #if !defined(VMS) && !defined(SYS_VXWORKS)
! 74: if (syslogit)
! 75: syslog(level, "%s", msg);
! 76: else
! 77: #endif
! 78: if (syslog_file != NULL)
! 79: log_to_file = TRUE;
! 80: else
! 81: log_to_term = TRUE;
! 82: #if DEBUG
! 83: if (debug > 0)
! 84: log_to_term = TRUE;
! 85: #endif
! 86: if (!(log_to_file || log_to_term))
! 87: return;
! 88:
! 89: /* syslog() adds the timestamp, name, and pid */
! 90: human_time = humanlogtime();
! 91:
! 92: /* syslog() adds trailing \n if not present */
! 93: if ('\n' != msg[strlen(msg) - 1])
! 94: nl_or_empty = nl;
! 95: else
! 96: nl_or_empty = empty;
! 97:
! 98: if (log_to_term) {
! 99: term_file = (level <= LOG_ERR)
! 100: ? stderr
! 101: : stdout;
! 102: fprintf(term_file, "%s %s[%d]: %s%s", human_time, prog,
! 103: (int)getpid(), msg, nl_or_empty);
! 104: fflush(term_file);
! 105: }
! 106:
! 107: if (log_to_file) {
! 108: fprintf(syslog_file, "%s %s[%d]: %s%s", human_time,
! 109: prog, (int)getpid(), msg, nl_or_empty);
! 110: fflush(syslog_file);
! 111: }
! 112: }
! 113:
! 114:
! 115: void
! 116: format_errmsg(
! 117: char * nfmt,
! 118: size_t lennfmt,
! 119: const char * fmt,
! 120: int errval
! 121: )
! 122: {
! 123: char c;
! 124: char *n;
! 125: const char *f;
! 126: size_t len;
! 127: char *err;
! 128:
! 129: n = nfmt;
! 130: f = fmt;
! 131: while ((c = *f++) != '\0' && n < (nfmt + lennfmt - 1)) {
! 132: if (c != '%') {
! 133: *n++ = c;
! 134: continue;
! 135: }
! 136: if ((c = *f++) != 'm') {
! 137: *n++ = '%';
! 138: if ('\0' == c)
! 139: break;
! 140: *n++ = c;
! 141: continue;
! 142: }
! 143: err = strerror(errval);
! 144: len = strlen(err);
! 145:
! 146: /* Make sure we have enough space for the error message */
! 147: if ((n + len) < (nfmt + lennfmt - 1)) {
! 148: memcpy(n, err, len);
! 149: n += len;
! 150: }
! 151: }
! 152: *n = '\0';
! 153: }
! 154:
! 155:
! 156: int
! 157: mvsnprintf(
! 158: char * buf,
! 159: size_t bufsiz,
! 160: const char * fmt,
! 161: va_list ap
! 162: )
! 163: {
! 164: #ifndef VSNPRINTF_PERCENT_M
! 165: char nfmt[256];
! 166: #else
! 167: const char * nfmt = fmt;
! 168: #endif
! 169: int errval;
! 170:
! 171: /*
! 172: * Save the error value as soon as possible
! 173: */
! 174: #ifdef SYS_WINNT
! 175: errval = GetLastError();
! 176: if (NO_ERROR == errval)
! 177: #endif /* SYS_WINNT */
! 178: errval = errno;
! 179:
! 180: #ifndef VSNPRINTF_PERCENT_M
! 181: format_errmsg(nfmt, sizeof(nfmt), fmt, errval);
! 182: #else
! 183: errno = errval;
! 184: #endif
! 185: return vsnprintf(buf, bufsiz, nfmt, ap);
! 186: }
! 187:
! 188:
! 189: int
! 190: mvfprintf(
! 191: FILE * fp,
! 192: const char * fmt,
! 193: va_list ap
! 194: )
! 195: {
! 196: #ifndef VSNPRINTF_PERCENT_M
! 197: char nfmt[256];
! 198: #else
! 199: const char * nfmt = fmt;
! 200: #endif
! 201: int errval;
! 202:
! 203: /*
! 204: * Save the error value as soon as possible
! 205: */
! 206: #ifdef SYS_WINNT
! 207: errval = GetLastError();
! 208: if (NO_ERROR == errval)
! 209: #endif /* SYS_WINNT */
! 210: errval = errno;
! 211:
! 212: #ifndef VSNPRINTF_PERCENT_M
! 213: format_errmsg(nfmt, sizeof(nfmt), fmt, errval);
! 214: #else
! 215: errno = errval;
! 216: #endif
! 217: return vfprintf(fp, nfmt, ap);
! 218: }
! 219:
! 220:
! 221: int
! 222: mfprintf(
! 223: FILE * fp,
! 224: const char * fmt,
! 225: ...
! 226: )
! 227: {
! 228: va_list ap;
! 229: int rc;
! 230:
! 231: va_start(ap, fmt);
! 232: rc = mvfprintf(fp, fmt, ap);
! 233: va_end(ap);
! 234:
! 235: return rc;
! 236: }
! 237:
! 238:
! 239: int
! 240: mprintf(
! 241: const char * fmt,
! 242: ...
! 243: )
! 244: {
! 245: va_list ap;
! 246: int rc;
! 247:
! 248: va_start(ap, fmt);
! 249: rc = mvfprintf(stdout, fmt, ap);
! 250: va_end(ap);
! 251:
! 252: return rc;
! 253: }
! 254:
! 255:
! 256: int
! 257: msnprintf(
! 258: char * buf,
! 259: size_t bufsiz,
! 260: const char * fmt,
! 261: ...
! 262: )
! 263: {
! 264: va_list ap;
! 265: size_t rc;
! 266:
! 267: va_start(ap, fmt);
! 268: rc = mvsnprintf(buf, bufsiz, fmt, ap);
! 269: va_end(ap);
! 270:
! 271: return rc;
! 272: }
! 273:
! 274:
! 275: void
! 276: msyslog(
! 277: int level,
! 278: const char * fmt,
! 279: ...
! 280: )
! 281: {
! 282: char buf[1024];
! 283: va_list ap;
! 284:
! 285: va_start(ap, fmt);
! 286: mvsnprintf(buf, sizeof(buf), fmt, ap);
! 287: va_end(ap);
! 288: addto_syslog(level, buf);
! 289: }
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