gcc/boehm-gc/if_not_there.c

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/* Conditionally execute a command based if the file argv[1] doesn't exist */
/* Except for execvp, we stick to ANSI C. */
# include "private/gcconfig.h"
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# include <stdio.h>
# include <stdlib.h>
# include <unistd.h>
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int main(argc, argv, envp)
int argc;
char ** argv;
char ** envp;
{
FILE * f;
if (argc < 3) goto Usage;
if ((f = fopen(argv[1], "rb")) != 0
|| (f = fopen(argv[1], "r")) != 0) {
fclose(f);
return(0);
}
printf("^^^^Starting command^^^^\n");
fflush(stdout);
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execvp(argv[2], argv+2);
exit(1);
Usage:
fprintf(stderr, "Usage: %s file_name command\n", argv[0]);
return(1);
}