import cinit from unix.schottelius.org

Signed-off-by: Nico Schottelius <nico@ikn.schottelius.org>

software/cinit/browse_source/cinit-0.0.7/old/read_file.c

@@ -0,0 +1,100 @@
+/* 
+ * (c) 2005 Nico Schottelius (nico-linux at schottelius.org)
+ * run_svc
+ * part of cinit
+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+
+#include <unistd.h>
+#include <stdio.h>
+
+
+#include "cinit.h"
+
+/***********************************************************************
+ * read_file: return file content, each line a char*
+ */
+
+char **read_file(char *file)
+{
+   int tmp;
+   int fd, argc;
+
+   char buf[BUFSIZE];
+   char *p, *sbuf = NULL;
+   char  **nargv = NULL;
+
+   struct stat stbuf;
+   
+   D_PRINTF("Lese Datei");
+   D_PRINTF(file);
+
+   if( !stat(file,&stbuf) ) {
+      fd = open(file,O_RDONLY);
+
+      if(fd == -1) {
+         LOG("params exists, but open params failed");
+         return NULL;
+      }
+
+      D_PRINTF("open ist ok");
+   
+      argc   = 0;
+
+      /* most likely one round */
+      while ( (tmp = read(fd,buf,BUFSIZE) ) != 0 ) {
+         if(tmp == -1) { 
+            perror("read");
+            return NULL;
+         }
+
+         sbuf = realloc(sbuf,argc + tmp + 1);
+         strncpy(&sbuf[argc],buf,tmp);
+         argc += tmp;
+      }
+      close(fd);
+   }
+
+   sbuf[argc] = '\0';
+
+   /************** build string **************/
+   /* The idea is to reuse the allocated memory. We'll simply
+   * replace the \n with \0 and set a char* to it.
+   * We'll lose the last byte (the initial \0), but we
+   * don't care, as we die some seconds later with execv() */
+
+   argc = 0;
+
+   while( (p = strchr(sbuf,'\n')) ) {
+      nargv = realloc(nargv, sizeof(char *) * (argc + 1));
+
+      if(nargv == NULL) {
+            LOG("realloc failed");
+            return NULL;
+      }
+
+      nargv[argc] = sbuf;
+      *p = '\0';
+      sbuf = p+1; /* is ok, as behind the last \n is a \0 */
+      argc++;
+   }
+
+   /************ close argv list **************/
+   nargv = realloc(nargv, sizeof(char *) * (argc + 1));
+   if(nargv == NULL) {
+      LOG("realloc failed");
+      return NULL;
+   }
+
+   nargv[argc] = NULL;  /* terminate argv list */
+   
+   return nargv;
+}