44 lines
869 B
C
44 lines
869 B
C
#include <stdio.h> /* fprintf(3), stderr */
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#include <sysexits.h> /* EX_USAGE */
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#include <unistd.h> /* execvp(3) */
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#include <sys/types.h> /* <sys/wait.h> */
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#include <sys/wait.h> /* wait(2) */
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#include "psargs.h"
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static char *program_name = "pscat";
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#define L_PAREN '['
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#define R_PAREN ']'
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int
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forking(char **argv){
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int child;
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char **corr;
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corr = corresponding_arg(argv, L_PAREN, R_PAREN);
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*corr = NULL;
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if(fork() == 0){
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execvp(argv[1], argv+1);
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}else{
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wait(&child);
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argv = corr;
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if(*++argv == NULL)
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return WIFEXITED(child) * WEXITSTATUS(child);
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else
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return forking(argv);
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}
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}
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int main(int argc, char *argv[]){
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if(check_arg(++argv, L_PAREN, R_PAREN) == 0){
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fprintf(stderr,
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"Usage: %s \"[\" [utility [argument...]] \"]\" ...\n",
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argv[-1] == NULL ? program_name : argv[-1]
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);
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return EX_USAGE;
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}else
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return forking(argv);
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}
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