added a "socket options" option to rsyncd.conf. This option will

[rsync/rsync.git] / util.c

diff --git a/util.c b/util.c
index 346d58a..cc39cdb 100644 (file)
--- a/util.c
+++ b/util.c
@@ -456,6 +456,21 @@ void strlcpy(char *d, char *s, int maxlen)
        d[len] = 0;
 }
 
+/* like strncat but does not 0 fill the buffer and always null 
+   terminates (thus it can use maxlen+1 space in d) */
+void strlcat(char *d, char *s, int maxlen)
+{
+       int len1 = strlen(d);
+       int len2 = strlen(s);
+       if (len1+len2 > maxlen) {
+               len2 = maxlen-len1;
+       }
+       if (len2 > 0) {
+               memcpy(d+len1, s, len2);
+               d[len1+len2] = 0;
+       }
+}
+
 /* turn a user name into a uid */
 int name_to_uid(char *name, uid_t *uid)
 {
@@ -483,3 +498,170 @@ int name_to_gid(char *name, gid_t *gid)
 }
 
 
+/****************************************************************************
+check if a process exists. 
+****************************************************************************/
+int process_exists(int pid)
+{
+       return(kill(pid,0) == 0 || errno != ESRCH);
+}
+
+/* lock a byte range in a open file */
+int lock_range(int fd, int offset, int len)
+{
+       struct flock lock;
+
+       lock.l_type = F_WRLCK;
+       lock.l_whence = SEEK_SET;
+       lock.l_start = offset;
+       lock.l_len = len;
+       lock.l_pid = 0;
+       
+       return fcntl(fd,F_SETLK,&lock) == 0;
+}
+
+
+static void glob_expand_one(char *s, char **argv, int *argc, int maxargs)
+{
+#ifndef HAVE_GLOB
+       if (!*s) s = ".";
+       argv[*argc] = strdup(s);
+       (*argc)++;
+       return;
+#else
+       glob_t globbuf;
+       int i;
+
+       if (!*s) s = ".";
+
+       argv[*argc] = strdup(s);
+
+       memset(&globbuf, 0, sizeof(globbuf));
+       glob(argv[*argc], 0, NULL, &globbuf);
+       if (globbuf.gl_pathc == 0) {
+               (*argc)++;
+               globfree(&globbuf);
+               return;
+       }
+       for (i=0; i<(maxargs - (*argc)) && i<globbuf.gl_pathc;i++) {
+               if (i == 0) free(argv[*argc]);
+               argv[(*argc) + i] = strdup(globbuf.gl_pathv[i]);
+               if (!argv[(*argc) + i]) out_of_memory("glob_expand");
+       }
+       globfree(&globbuf);
+       (*argc) += i;
+#endif
+}
+
+void glob_expand(char *base, char **argv, int *argc, int maxargs)
+{
+       char *s = argv[*argc];
+       char *p, *q;
+
+       if (!s || !*s) return;
+
+       if (strncmp(s, base, strlen(base)) == 0) {
+               s += strlen(base);
+       }
+
+       s = strdup(s);
+       if (!s) out_of_memory("glob_expand");
+
+       q = s;
+       while ((p = strstr(q,base)) && ((*argc) < maxargs)) {
+               if (p != q && *(p-1) == ' ' && p[strlen(base)] == '/') {
+                       /* split it at this point */
+                       *(p-1) = 0;
+                       glob_expand_one(q, argv, argc, maxargs);
+                       q = p+strlen(base)+1;
+               } else {
+                       q++;
+               }
+       }
+
+       if (*q && (*argc < maxargs)) glob_expand_one(q, argv, argc, maxargs);
+
+       free(s);
+}
+
+/*******************************************************************
+  convert a string to lower case
+********************************************************************/
+void strlower(char *s)
+{
+       while (*s) {
+               if (isupper(*s)) *s = tolower(*s);
+               s++;
+       }
+}
+
+/* this is like vsnprintf but the 'n' limit does not include
+   the terminating null. So if you have a 1024 byte buffer then
+   pass 1023 for n */
+int vslprintf(char *str, int n, const char *format, va_list ap)
+{
+#ifdef HAVE_VSNPRINTF
+       int ret = vsnprintf(str, n, format, ap);
+       if (ret > n || ret < 0) {
+               str[n] = 0;
+               return -1;
+       }
+       str[ret] = 0;
+       return ret;
+#else
+       static char *buf;
+       static int len=MAXPATHLEN*8;
+       int ret;
+
+       /* this code is NOT a proper vsnprintf() implementation. It
+          relies on the fact that all calls to slprintf() in rsync
+          pass strings which have already been checked to be less
+          than MAXPATHLEN in length and never more than 2 strings are
+          concatenated. This means the above buffer is absolutely
+          ample and can never be overflowed.
+
+          In the future we would like to replace this with a proper
+          vsnprintf() implementation but right now we need a solution
+          that is secure and portable. This is it.  */
+
+       if (!buf) {
+               buf = malloc(len);
+               if (!buf) {
+                       /* can't call debug or we would recurse */
+                       exit(1);
+               }
+       }
+
+       ret = vsprintf(buf, format, ap);
+
+       if (ret < 0) {
+               str[0] = 0;
+               return -1;
+       }
+
+       if (ret < n) {
+               n = ret;
+       } else if (ret > n) {
+               ret = -1;
+       }
+
+       buf[n] = 0;
+       
+       memcpy(str, buf, n+1);
+
+       return ret;
+#endif
+}
+
+
+/* like snprintf but always null terminates */
+int slprintf(char *str, int n, char *format, ...)
+{
+       va_list ap;  
+       int ret;
+
+       va_start(ap, format);
+       ret = vslprintf(str,n,format,ap);
+       va_end(ap);
+       return ret;
+}