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Full Discussion: Ex1 homework help
Homework and Emergencies Homework & Coursework Questions Ex1 homework help Post 302735581 by alexthelion on Sunday 25th of November 2012 04:18:01 PM
Old 11-25-2012
Rudic maybe you right but I'm not strong in Linux so its difficult for me even trying to understand what you mean with the execv

---------- Post updated at 04:18 PM ---------- Previous update was at 04:13 PM ----------

yeah but it supposed to serach In every path in the pathindex and If it found it should be executed
i'm wrong?

I tried other method and still not working Smilie

Code:
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>

int main()
{
 pid_t pid;
 int pStatus;
 char *sh="Shell>";
 char runLine[50];
 int i,pathindex=0, ret;
 char line[80];   // getting the user prompt
 char *ListPathes=""; //
 char *currentpath, *path;  // current path to execute in   
 char *argv[10]={NULL} ;
//////////////////////////////////////////////////////////////////////////////
printf("CMD: ");
gets(line);
 while ((strcmp(line,"leave"))!=0)
{
 if ((pid=fork())==0) //child process started
 {
   ListPathes=getenv("PATH");
   currentpath=strtok(ListPathes,":");
   while (currentpath!=NULL)
    {
      strcpy(runLine,currentpath);
      strcat(runLine,"/");
      strcat(runLine,line);
      execv(runLine,argv);
      currentpath=strtok(NULL,":");
    }
 }
 else //parent process continue
 {
 wait(&pStatus);
 if (pStatus!=0)
  printf("Error");
 }
}
}


Last edited by Scott; 11-25-2012 at 05:57 PM.. Reason: Code tags
 

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STRING(3)						     Linux Programmer's Manual							 STRING(3)

NAME
stpcpy, strcasecmp, strcat, strchr, strcmp, strcoll, strcpy, strcspn, strdup, strfry, strlen, strncat, strncmp, strncpy, strncasecmp, strp- brk, strrchr, strsep, strspn, strstr, strtok, strxfrm, index, rindex - string operations SYNOPSIS
#include <strings.h> int strcasecmp(const char *s1, const char *s2); int strncasecmp(const char *s1, const char *s2, size_t n); char *index(const char *s, int c); char *rindex(const char *s, int c); #include <string.h> char *stpcpy(char *dest, const char *src); char *strcat(char *dest, const char *src); char *strchr(const char *s, int c); int strcmp(const char *s1, const char *s2); int strcoll(const char *s1, const char *s2); char *strcpy(char *dest, const char *src); size_t strcspn(const char *s, const char *reject); char *strdup(const char *s); char *strfry(char *string); size_t strlen(const char *s); char *strncat(char *dest, const char *src, size_t n); int strncmp(const char *s1, const char *s2, size_t n); char *strncpy(char *dest, const char *src, size_t n); char *strpbrk(const char *s, const char *accept); char *strrchr(const char *s, int c); char *strsep(char **stringp, const char *delim); size_t strspn(const char *s, const char *accept); char *strstr(const char *haystack, const char *needle); char *strtok(char *s, const char *delim); size_t strxfrm(char *dest, const char *src, size_t n); DESCRIPTION
The string functions perform string operations on null-terminated strings. See the individual man pages for descriptions of each function. SEE ALSO
index(3), rindex(3), stpcpy(3), strcasecmp(3), strcat(3), strchr(3), strcmp(3), strcoll(3), strcpy(3), strcspn(3), strdup(3), strfry(3), strlen(3), strncasecmp(3), strncat(3), strncmp(3), strncpy(3), strpbrk(3), strrchr(3), strsep(3), strspn(3), strstr(3), strtok(3), strxfrm(3) COLOPHON
This page is part of release 3.44 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/. 2010-02-25 STRING(3)
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