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Length: 590 (0x24e)
Types: TextFile
Notes: UNIX file
Names: »system.c«
└─⟦f27320a65⟧ Bits:30001972 Commodore 900 hard disk image with partial source code
└─⟦f4b8d8c84⟧ UNIX V7 Filesystem
└─ ⟦this⟧ »libc/gen/system.c«
/*
* Call the system to execute a command line
* which is passed as an argument.
*/
#include <stdio.h>
#include <signal.h>
system(line)
char *line;
{
int status, pid;
register wpid;
register int (*intfun)(), (*quitfun)();
if ((pid = fork()) < 0)
return (-1);
if (pid == 0) { /* Child */
execl("/bin/sh", "sh", "-c", line, NULL);
exit(0177);
}
intfun = signal(SIGINT, SIG_IGN);
quitfun = signal(SIGQUIT, SIG_IGN);
while ((wpid = wait(&status))!=pid && wpid>=0)
;
if (wpid < 0)
status = wpid;
signal(SIGINT, intfun);
signal(SIGQUIT, quitfun);
return (status);
}