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