X-Git-Url: http://git.indexdata.com/?p=yaz-moved-to-github.git;a=blobdiff_plain;f=src%2Flog.c;h=2004846b2532fab7747ef0101840683a5d38de74;hp=1a5e6b5a86026e020367252208be0ea56a2ac55f;hb=04875a323c2a604664b0915e226d269fa65bf84c;hpb=fb6d99a0c7e07d9cc4a315c447deaf6564a85505

diff --git a/src/log.c b/src/log.c
index 1a5e6b5..2004846 100644
--- a/src/log.c
+++ b/src/log.c
@@ -1,13 +1,13 @@
 /*
- * Copyright (C) 1995-2005, Index Data ApS
+ * Copyright (C) 1995-2006, Index Data ApS
  * See the file LICENSE for details.
  *
- * $Id: log.c,v 1.25 2005-06-25 15:46:04 adam Exp $
+ * $Id: log.c,v 1.41 2006-10-04 07:42:13 adam Exp $
  */
 
 /**
  * \file log.c
- * \brief Implements logging utility
+ * \brief Logging utility
  */
 
 #if HAVE_CONFIG_H
@@ -26,6 +26,7 @@
 #include <pth.h>
 #endif
 
+#include <sys/stat.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <ctype.h>
@@ -42,6 +43,7 @@ static int mutex_init_flag = 0; /* not yet initialized */
 
 #define HAS_STRERROR 1
 
+
 #if HAS_STRERROR
 
 #else
@@ -54,28 +56,53 @@ char *strerror(int n)
 #endif
 
 
+static int default_log_level(void)
+{
+    char *env = getenv("YAZ_LOG");
+    if (env != 0)
+        return yaz_log_mask_str_x(env, YLOG_DEFAULT_LEVEL);
+    else
+        return YLOG_DEFAULT_LEVEL;
+}
+
+
+static int l_level = -1;        /* will be set from default_log_level() */
+
+enum l_file_type {  use_stderr, use_none, use_file };
+static enum l_file_type yaz_file_type = use_stderr;
+static FILE *yaz_global_log_file = NULL;
+
+static void (*start_hook_func)(int, const char *, void *) = NULL;
+static void *start_hook_info;
+
+static void (*end_hook_func)(int, const char *, void *) = NULL;
+static void *end_hook_info;
+
+static void (*hook_func)(int, const char *, void *) = NULL;
+static void *hook_info;
 
-static int l_level = YLOG_DEFAULT_LEVEL;
-static FILE *l_file = NULL;
 static char l_prefix[512] = "";
 static char l_prefix2[512] = "";
 static char l_fname[512] = "";
 
+
 static char l_old_default_format[] = "%H:%M:%S-%d/%m";
 static char l_new_default_format[] = "%Y%m%d-%H%M%S";
 #define TIMEFORMAT_LEN 50
 static char l_custom_format[TIMEFORMAT_LEN] = "";
 static char *l_actual_format = l_old_default_format;
 
-/** l_max_size tells when to rotate the log. Default to 1 GB */
-static const int l_def_max_size = 1024*1024*1024;
+/** l_max_size tells when to rotate the log. Default is 1 GB 
+    This is almost the same as never, but it saves applications in the
+    case of 2 or 4 GB file size limits..
+ */
 static int l_max_size = 1024*1024*1024;
 
 #define MAX_MASK_NAMES 35   /* 32 bits plus a few combo names */
 static struct {
     int mask;
     char *name;
-}  mask_names[MAX_MASK_NAMES] =
+} mask_names[MAX_MASK_NAMES] =
 {
     { YLOG_FATAL,  "fatal"},
     { YLOG_DEBUG,  "debug"},
@@ -83,124 +110,145 @@ static struct {
     { YLOG_LOG,    "log"  },
     { YLOG_ERRNO,  ""},
     { YLOG_MALLOC, "malloc"},
-    { YLOG_APP,     "app"  },
+    { YLOG_APP,    "app"  },
     { YLOG_NOTIME, "notime" },
     { YLOG_APP2,   "app2" }, 
     { YLOG_APP3,   "app3" },
     { YLOG_ALL,    "all"  },
     { YLOG_FLUSH,  "flush" },
     { YLOG_LOGLVL, "loglevel" }, 
-    { 0,          "none" },
+    { 0,           "none" },
     { 0, NULL }
     /* the rest will be filled in if the user defines dynamic modules*/
 };  
+
 static unsigned int next_log_bit = YLOG_LAST_BIT<<1; /* first dynamic bit */
 
-static void init_mutex()
+static void init_mutex(void)
 {
     if (mutex_init_flag)
         return;
-    nmem_mutex_create (&log_mutex);
+    nmem_mutex_create(&log_mutex);
     mutex_init_flag = 1;
 }
 
-
 FILE *yaz_log_file(void)
 {
-    if (!l_file)
-        l_file = stderr;
-    return l_file;
+    FILE *f = 0;
+    switch(yaz_file_type)
+    {
+        case use_stderr: f = stderr; break;
+        case use_none: f = 0; break;
+        case use_file: f = yaz_global_log_file; break;
+    }
+    return f;
+}
+
+void yaz_log_close(void)
+{
+    if (yaz_file_type == use_file && yaz_global_log_file)
+    {
+        fclose(yaz_global_log_file);
+        yaz_global_log_file = 0;
+    }
 }
 
-void yaz_log_init_file (const char *fname)
+void yaz_log_init_file(const char *fname)
 {
-    if (!mutex_init_flag)
-        init_mutex();
+    init_mutex();
+
+    yaz_log_close();
     if (fname)
     {
+        if (*fname == '\0')
+            yaz_file_type = use_stderr; /* empty name; use stderr */
+        else
+            yaz_file_type = use_file;
         strncpy(l_fname, fname, sizeof(l_fname)-1);
         l_fname[sizeof(l_fname)-1] = '\0';
     }
     else
-        l_fname[0] = '\0';
+    {
+        yaz_file_type = use_none;  /* NULL name; use no file at all */
+        l_fname[0] = '\0'; 
+    }
     yaz_log_reopen();
 }
 
-void yaz_log_reopen(void)
+static void rotate_log(const char *cur_fname)
 {
-    FILE *new_file;
-    if (!mutex_init_flag)
-        init_mutex();
-    if (!l_file)
-        l_file = stderr;
-    if (!*l_fname)
-        new_file = stderr;
-    else if (!(new_file = fopen(l_fname, "a")))
+    int i;
+#ifdef WIN32
+    /* windows can't rename a file if it is open */
+    fclose(yaz_global_log_file);
+    yaz_global_log_file = 0;
+#endif
+    for (i = 0; i<9; i++)
     {
-        new_file=l_file;
-        l_file=stderr;  /* just to be sure we don't rotate logs and recurse */
-        yaz_log(YLOG_WARN|YLOG_ERRNO,"Could not open log file '%s'",l_fname);
-        l_file=new_file; /* restore to old value, probably stderr as well */
-        return;
+        char fname_str[FILENAME_MAX];
+        struct stat stat_buf;
+
+        sprintf(fname_str, "%s.%d", cur_fname, i);
+        if (stat(fname_str, &stat_buf) != 0)
+            break;
     }
-    if (l_file != stderr)
+    for (; i >= 0; --i)
     {
-        fclose (l_file);
-    }
-    if (l_level & YLOG_FLUSH)
-        setvbuf(new_file, 0, _IONBF, 0);
-    l_file = new_file;
-}
+        char fname_str[2][FILENAME_MAX];
 
-static void rotate_log()
-{
-    char newname[512];
-    if (l_file==stderr)
-        return; /* can't rotate that */
-    if (!*l_fname)
-        return; /* hmm, no name, can't rotate */
-    strncpy(newname, l_fname, 509);
-    newname[509] = '\0'; /* make sure it is terminated */
-    strcat(newname,".1");
+        if (i > 0)
+            sprintf(fname_str[0], "%s.%d", cur_fname, i-1);
+        else
+            sprintf(fname_str[0], "%s", cur_fname);
+        sprintf(fname_str[1], "%s.%d", cur_fname, i);
 #ifdef WIN32
-    /* windows can't rename a file if it is open */
-    fclose(l_file);
-    l_file = stderr;
+        MoveFileEx(fname_str[0], fname_str[1], MOVEFILE_REPLACE_EXISTING);
+#else
+        rename(fname_str[0], fname_str[1]);
 #endif
-    rename(l_fname, newname);
-    yaz_log_reopen();
+    }
 }
 
 
-void yaz_log_init_level (int level)
+void yaz_log_init_level(int level)
 {
-    if (!mutex_init_flag)
-        init_mutex();
+    init_mutex();
+    if (l_level < 0) 
+        l_level = default_log_level();
     if ( (l_level & YLOG_FLUSH) != (level & YLOG_FLUSH) )
     {
         l_level = level;
         yaz_log_reopen(); /* make sure we set buffering right */
-    } else
+    } 
+    else
         l_level = level;
     if (l_level  & YLOG_LOGLVL)
     {  /* dump the log level bits */
-        char *bittype="Static ";
-        int i;
-        yaz_log(YLOG_LOGLVL,"Setting log level to %d = 0x%08x",l_level,l_level);
-        for (i = 0; mask_names[i].name; i++)
+        const char *bittype = "Static ";
+        int i, sz;
+
+        yaz_log(YLOG_LOGLVL, "Setting log level to %d = 0x%08x",
+                l_level, l_level);
+        /* determine size of mask_names (locked) */
+        nmem_mutex_enter(log_mutex);
+        for (sz = 0; mask_names[sz].name; sz++)
+            ;
+        nmem_mutex_leave(log_mutex);
+        /* second pass without lock */
+        for (i = 0; i < sz; i++)
             if (mask_names[i].mask && *mask_names[i].name)
-                if (strcmp(mask_names[i].name,"all")!=0)
+                if (strcmp(mask_names[i].name, "all") != 0)
                 {
-                    yaz_log(YLOG_LOGLVL,"%s log bit %08x '%s' is %s",
-                        bittype, mask_names[i].mask, mask_names[i].name,
-                        (level & mask_names[i].mask)?  "ON": "off");
-                if (mask_names[i].mask>YLOG_LAST_BIT)
-                    bittype="Dynamic";
+                    yaz_log(YLOG_LOGLVL, "%s log bit %08x '%s' is %s",
+                            bittype, mask_names[i].mask, mask_names[i].name,
+                            (level & mask_names[i].mask)?  "ON": "off");
+                    if (mask_names[i].mask > YLOG_LAST_BIT)
+                        bittype = "Dynamic";
                 }
     }
 }
 
-void yaz_log_init_prefix (const char *prefix)
+void yaz_log_init_prefix(const char *prefix)
 {
     if (prefix && *prefix)
         sprintf(l_prefix, "%.511s ", prefix);
@@ -208,7 +256,7 @@ void yaz_log_init_prefix (const char *prefix)
         *l_prefix = 0;
 }
 
-void yaz_log_init_prefix2 (const char *prefix)
+void yaz_log_init_prefix2(const char *prefix)
 {
     if (prefix && *prefix)
         sprintf(l_prefix2, "%.511s ", prefix);
@@ -218,77 +266,198 @@ void yaz_log_init_prefix2 (const char *prefix)
 
 void yaz_log_init(int level, const char *prefix, const char *fname)
 {
-    if (!mutex_init_flag)
-        init_mutex();
-    yaz_log_init_level (level);
-    yaz_log_init_prefix (prefix);
+    init_mutex();
+    yaz_log_init_level(level);
+    yaz_log_init_prefix(prefix);
     if (fname && *fname)
-        yaz_log_init_file (fname);
+        yaz_log_init_file(fname);
 }
 
 void yaz_log_init_max_size(int mx)
 {
-    if (mx <0)
-        l_max_size = l_def_max_size;
-    else
+    if (mx > 0)
         l_max_size = mx;
+    else
+        l_max_size = 0;
 }
 
-static void (*start_hook_func)(int, const char *, void *) = NULL;
-static void *start_hook_info;
-static void (*end_hook_func)(int, const char *, void *) = NULL;
-static void *end_hook_info;
+void yaz_log_set_handler(void (*func)(int, const char *, void *), void *info)
+{
+    hook_func = func;
+    hook_info = info;
+}
 
-void log_event_start (void (*func)(int, const char *, void *), void *info)
+void log_event_start(void (*func)(int, const char *, void *), void *info)
 {
-    start_hook_func = func;
-    start_hook_info = info;
+     start_hook_func = func;
+     start_hook_info = info;
 }
 
-void log_event_end (void (*func)(int, const char *, void *), void *info)
+void log_event_end(void (*func)(int, const char *, void *), void *info)
 {
-    end_hook_func = func;
-    end_hook_info = info;
+     end_hook_func = func;
+     end_hook_info = info;
 }
 
-void yaz_log(int level, const char *fmt, ...)
+static void yaz_log_open_check(struct tm *tm, int force, const char *filemode)
 {
-    va_list ap;
-    char buf[4096], flags[1024];
-    int i;
-    time_t ti;
-    struct tm *tim;
-    char tbuf[TIMEFORMAT_LEN] = "";
-    int o_level = level;
-    int flen; 
+    char new_filename[512];
+    static char cur_filename[512] = "";
 
-    if (!(level & l_level))
-        return;
-    if (!mutex_init_flag)
-        init_mutex();
-    if (!l_file)
-        l_file = stderr;
-    
-    if ((l_file != stderr) && (l_max_size>0))
+    if (l_fname && *l_fname)
     {
-        nmem_mutex_enter (log_mutex);
-        flen = ftell(l_file);
-        if (flen>l_max_size) 
-            rotate_log();
-        nmem_mutex_leave (log_mutex);
+        strftime(new_filename, sizeof(new_filename)-1, l_fname, tm);
+        if (strcmp(new_filename, cur_filename))
+        {
+            strcpy(cur_filename, new_filename);
+            force = 1;
+        }
     }
 
-    *flags = '\0';
-    for (i = 0; level && mask_names[i].name; i++)
-        if ( mask_names[i].mask & level)
+    if (l_max_size > 0 && yaz_global_log_file && yaz_file_type == use_file)
+    {
+        long flen = ftell(yaz_global_log_file);
+        if (flen > l_max_size)
         {
-            if (*mask_names[i].name && mask_names[i].mask && 
-                 mask_names[i].mask != YLOG_ALL)
+            rotate_log(cur_filename);
+            force = 1;
+        }
+    }
+    if (force && yaz_file_type == use_file && *cur_filename)
+    {
+        yaz_log_close();
+        yaz_global_log_file = fopen(cur_filename, filemode);
+        if (l_level < 0) l_level = default_log_level();
+        if (l_level & YLOG_FLUSH)
+            setvbuf(yaz_global_log_file, 0, _IONBF, 0);
+    }
+}
+
+static void yaz_log_do_reopen(const char *filemode)
+{
+    time_t cur_time = time(0);
+#if HAVE_LOCALTIME_R
+    struct tm tm0, *tm = &tm0;
+#else
+    struct tm *tm;
+#endif
+
+    nmem_mutex_enter(log_mutex);
+#if HAVE_LOCALTIME_R
+    localtime_r(&cur_time, tm);
+#else
+    tm = localtime(&cur_time);
+#endif
+    yaz_log_open_check(tm, 1, filemode);
+    nmem_mutex_leave(log_mutex);
+}
+
+
+void yaz_log_reopen()
+{
+    yaz_log_do_reopen("a");
+}
+
+void yaz_log_trunc()
+{
+    yaz_log_do_reopen("w");
+}
+
+
+
+static void yaz_strftime(char *dst, size_t sz,
+                         const char *fmt, const struct tm *tm)
+{
+    const char *cp = strstr(fmt, "%!");
+    if (cp && strlen(fmt) < 60)
+    {
+        char fmt2[80];
+        char tpidstr[20];
+#ifdef WIN32
+        DWORD tid = GetCurrentThreadId();
+#else
+        long tid = 0;
+#if YAZ_POSIX_THREADS
+        tid = pthread_self();
+#endif
+#endif
+        memcpy(fmt2, fmt, cp-fmt);
+        fmt2[cp-fmt] = '\0';
+        sprintf(tpidstr, "%08lx", (long) tid);
+        strcat(fmt2, tpidstr);
+        strcat(fmt2, cp+2);
+        strftime(dst, sz, fmt2, tm);     
+    }
+    else
+        strftime(dst, sz, fmt, tm);
+}
+                            
+static void yaz_log_to_file(int level, const char *log_message)
+{
+    FILE *file;
+    time_t ti = time(0);
+#if HAVE_LOCALTIME_R
+    struct tm tm0, *tm = &tm0;
+#else
+    struct tm *tm;
+#endif
+
+    init_mutex();
+
+    nmem_mutex_enter(log_mutex);
+    
+#if HAVE_LOCALTIME_R
+    localtime_r(&ti, tm);
+#else
+    tm = localtime(&ti);
+#endif
+    
+    yaz_log_open_check(tm, 0, "a");  
+    file = yaz_log_file(); /* file may change in yaz_log_open_check */
+
+    if (file)
+    {
+        char tbuf[TIMEFORMAT_LEN];
+        char flags[1024];
+        int i;
+        
+        *flags = '\0';
+        for (i = 0; level && mask_names[i].name; i++)
+            if ( mask_names[i].mask & level)
             {
-                sprintf(flags + strlen(flags), "[%s]", mask_names[i].name);
-                level &= ~mask_names[i].mask;
+                if (*mask_names[i].name && mask_names[i].mask && 
+                    mask_names[i].mask != YLOG_ALL)
+                {
+                    sprintf(flags + strlen(flags), "[%s]", mask_names[i].name);
+                    level &= ~mask_names[i].mask;
+                }
             }
-        }
+        
+        if (l_level & YLOG_NOTIME)
+            tbuf[0] = '\0';
+        else
+            yaz_strftime(tbuf, TIMEFORMAT_LEN-1, l_actual_format, tm);
+        tbuf[TIMEFORMAT_LEN-1] = '\0';
+        
+        fprintf(file, "%s %s%s %s%s\n", tbuf, l_prefix, flags, l_prefix2,
+                log_message);
+        if (l_level & (YLOG_FLUSH|YLOG_DEBUG) )
+            fflush(file);
+    }
+    nmem_mutex_leave(log_mutex);
+}
+
+void yaz_log(int level, const char *fmt, ...)
+{
+    va_list ap;
+    char buf[4096];
+    FILE *file;
+    int o_level = level;
+
+    if (l_level < 0)
+        l_level = default_log_level();
+    if (!(level & l_level))
+        return;
     va_start(ap, fmt);
 #ifdef WIN32
     _vsnprintf(buf, sizeof(buf)-1, fmt, ap);
@@ -310,17 +479,11 @@ void yaz_log(int level, const char *fmt, ...)
     va_end (ap);
     if (start_hook_func)
         (*start_hook_func)(o_level, buf, start_hook_info);
-    ti = time(0);
-    tim = localtime(&ti);
-    if (l_level & YLOG_NOTIME)
-        tbuf[0] = '\0';
-    else
-        strftime(tbuf, TIMEFORMAT_LEN-1, l_actual_format, tim);
-    tbuf[TIMEFORMAT_LEN-1] = '\0';
-    fprintf(l_file, "%s %s%s %s%s\n", tbuf, l_prefix, flags,
-            l_prefix2, buf);
-    if (l_level & (YLOG_FLUSH|YLOG_DEBUG) )
-        fflush(l_file);
+    if (hook_func)
+        (*hook_func)(o_level, buf, hook_info);
+    file = yaz_log_file();
+    if (file)
+        yaz_log_to_file(level, buf);
     if (end_hook_func)
         (*end_hook_func)(o_level, buf, end_hook_info);
 }
@@ -332,7 +495,7 @@ void yaz_log_time_format(const char *fmt)
         l_actual_format = l_new_default_format;
         return; 
     }
-    if (0==strcmp(fmt,"old"))
+    if (0==strcmp(fmt, "old"))
     { /* force the old format */
         l_actual_format = l_old_default_format;
         return; 
@@ -348,35 +511,41 @@ static char *clean_name(const char *name, int len, char *namebuf, int buflen)
 {
     char *p = namebuf;
     char *start = namebuf;
-    if (buflen <len)
-        len = buflen; 
+    if (buflen <= len)
+        len = buflen-1; 
     strncpy(namebuf, name, len);
     namebuf[len] = '\0';
-    while ((p = strchr(start,'/')))
+    while ((p = strchr(start, '/')))
         start = p+1;
-    if ((p = strrchr(start,'.')))
+    if ((p = strrchr(start, '.')))
         *p = '\0';
     return start;
-
 }
 
 static int define_module_bit(const char *name)
 {
     int i;
-    if (!mutex_init_flag)
-        init_mutex();
+    init_mutex();
+    nmem_mutex_enter(log_mutex);
     for (i = 0; mask_names[i].name; i++)
-        ;
+        if (0 == strcmp(mask_names[i].name, name))
+        {
+            nmem_mutex_leave(log_mutex);
+            return mask_names[i].mask;
+        }
     if ( (i>=MAX_MASK_NAMES) || (next_log_bit >= 1<<31 ))
     {
-        yaz_log(YLOG_WARN,"No more log bits left, not logging '%s'", name);
+        nmem_mutex_leave(log_mutex);
+        yaz_log(YLOG_WARN, "No more log bits left, not logging '%s'", name);
         return 0;
     }
     mask_names[i].mask = next_log_bit;
     next_log_bit = next_log_bit<<1;
-    mask_names[i].name = xstrdup(name);
+    mask_names[i].name = malloc(strlen(name)+1);
+    strcpy(mask_names[i].name, name);
     mask_names[i+1].name = NULL;
     mask_names[i+1].mask = 0;
+    nmem_mutex_leave(log_mutex);
     return mask_names[i].mask;
 }
 
@@ -385,67 +554,59 @@ int yaz_log_module_level(const char *name)
     int i;
     char clean[255];
     char *n = clean_name(name, strlen(name), clean, sizeof(clean));
-    if (!mutex_init_flag)
-        init_mutex();
+    init_mutex();
+    
+    nmem_mutex_enter(log_mutex);
     for (i = 0; mask_names[i].name; i++)
-        if (0==strcmp(n,mask_names[i].name))
+        if (0==strcmp(n, mask_names[i].name))
         {
-            yaz_log(YLOG_LOGLVL,"returning log bit 0x%x for '%s' %s",
+            nmem_mutex_leave(log_mutex);
+            yaz_log(YLOG_LOGLVL, "returning log bit 0x%x for '%s' %s",
                     mask_names[i].mask, n, 
-                    strcmp(n,name)?name:"" );
+                    strcmp(n,name) ? name : "");
             return mask_names[i].mask;
         }
-    yaz_log(YLOG_LOGLVL,"returning NO log bit for '%s' %s", n, 
-                    strcmp(n,name)?name:"" );
+    nmem_mutex_leave(log_mutex);
+    yaz_log(YLOG_LOGLVL, "returning NO log bit for '%s' %s", n, 
+                    strcmp(n, name) ? name : "" );
     return 0;
 }
 
-int yaz_log_mask_str (const char *str)
+int yaz_log_mask_str(const char *str)
 {
-    return yaz_log_mask_str_x (str, YLOG_DEFAULT_LEVEL);
+    return yaz_log_mask_str_x(str, default_log_level());
 }
 
-int yaz_log_mask_str_x (const char *str, int level)
+int yaz_log_mask_str_x(const char *str, int level)
 {
     const char *p;
-    int i;
-    char clean[255] = "";
-    char *n = clean;
 
     while (*str)
     {
-        int found = 0;
         int negated = 0;
         for (p = str; *p && *p != ','; p++)
             ;
         if (*str=='-')
         {
-            negated=1;
+            negated = 1;
             str++;
         }
         if (isdigit(*(unsigned char *) str))
         {
-            level = atoi (str);
-            found = 1;
+            level = atoi(str);
         }
         else 
         {
-            n = clean_name(str, p-str, clean, sizeof(clean));
-            for (i = 0; mask_names[i].name; i++)
-                if (0==strcmp (mask_names[i].name,n))
-                {
-                    if (mask_names[i].mask)
-                        if (negated)
-                            level &= ~mask_names[i].mask;
-                        else
-                            level |= mask_names[i].mask;
-                    else
-                        level = 0; /* 'none' clears them all */
-                    found = 1;
-                }
+            char clean[509];
+            char *n = clean_name(str, p-str, clean, sizeof(clean));
+            int mask = define_module_bit(n);
+            if (!mask)
+                level = 0;  /* 'none' clears them all */
+            else if (negated)
+                level &= ~mask;
+            else
+                level |= mask;
         }
-        if (!found)
-            level |= define_module_bit(n);
         if (*p == ',')
             p++;
         str = p;
@@ -459,4 +620,3 @@ int yaz_log_mask_str_x (const char *str, int level)
  * End:
  * vim: shiftwidth=4 tabstop=8 expandtab
  */
-