system(str) char *str; { int status; if(fork() == 0) execl("/bin/sh", "sh", "-c", str, 0); wait(&status); }
EXECL 源代码
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char buf[100]; main(argc, argv) char **argv; { register i; register char *c1, *c2; if(argc < 3) { write(2, "arg count\n", 1…
#include "apue.h" #include int main(void) { pid_t pid; if ((pid = fork()) < 0) { err_sys("fork error"); } else if (pid == …
#include #include #include int system(const char *cmdstring) /* version without signal handling */ { pid_t pid; int status;…
#include "apue.h" #include int main(void) { pid_t pid; if ((pid = fork()) < 0) { err_sys("fork error"); } else if (pid == …
#include #include #include int system(const char *cmdstring) /* version without signal handling */ { pid_t pid; int status;…
#include #include #include int main() { if(fork()==0){ if(execl("/bin/ps","ps","-ef",NULL)
/* execl.c */ /* This and the other exec*.c files in this directory require the target to provide the _execve syscall. */ #…
#ifndef lint static char sccsid[] = "@(#)pipe.c 1.1 92/07/30 Copyr Sun Micro"; #endif /* * Copyright (c) 1985 by Sun Microsys…
#include "apue.h" #include int main(void) { pid_t pid; if ((pid = fork()) < 0) { err_sys("fork error"); } else if (pid == …