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Differential D40260 Diff 122726 usr.sbin/cron/cron/popen.c

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usr.sbin/cron/cron/popen.c

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* *
*/ */
/* this came out of the ftpd sources; it's been modified to avoid the /* this came out of the ftpd sources; it's been modified to avoid the
* globbing stuff since we don't need it. also execvp instead of execv. * globbing stuff since we don't need it. also execvp instead of execv.
*/ */
#ifndef lint #ifndef lint
static const char rcsid[] =
"$Id: popen.c,v 1.3 1998/08/14 00:32:41 vixie Exp $";
#if 0 #if 0
static char sccsid[] = "@(#)popen.c 5.7 (Berkeley) 2/14/89"; static const char sccsid[] = "@(#)popen.c 5.7 (Berkeley) 2/14/89";
#endif #endif
static const char rcsid[] =
"$FreeBSD$";
#endif /* not lint */ #endif /* not lint */
#include "cron.h" #include "cron.h"
#include <sys/signal.h>
#include <fcntl.h>
#include <paths.h>
#if defined(SYSLOG)
# include <syslog.h>
#endif
#if defined(LOGIN_CAP) #if defined(LOGIN_CAP)
# include <login_cap.h> # include <login_cap.h>
#endif #endif
#define MAX_ARGS 100 #define MAX_ARGS 100
#define WANT_GLOBBING 0 #define WANT_GLOBBING 0
/* /*
* Special version of popen which avoids call to shell. This insures no one * Special version of popen which avoids call to shell. This insures no one
* may create a pipe to a hidden program as a side effect of a list or dir * may create a pipe to a hidden program as a side effect of a list or dir
* command. * command.
*/ */
static PID_T *pids; static PID_T *pids;
static int fds; static int fds;
FILE * FILE *
cron_popen(char *program, char *type, entry *e, PID_T *pidptr) cron_popen(char *program, char *type, entry *e, PID_T *pidptr)
{ {
register char *cp; char *cp;
FILE *iop; FILE *iop;
int argc, pdes[2]; int argc, pdes[2];
PID_T pid; PID_T pid;
char *usernm; char *usernm;
char *argv[MAX_ARGS + 1]; char *argv[MAX_ARGS + 1];
# if defined(LOGIN_CAP) # if defined(LOGIN_CAP)
struct passwd *pwd; struct passwd *pwd;
login_cap_t *lc; login_cap_t *lc;
# endif # endif
#if WANT_GLOBBING #if WANT_GLOBBING
char **pop, *vv[2]; char **pop, *vv[2];
int gargc; int gargc;
char *gargv[1000]; char *gargv[1000];
extern char **glob(), **copyblk(); extern char **glob(), **copyblk();
#endif #endif
if ((*type != 'r' && *type != 'w') || type[1]) if ((*type != 'r' && *type != 'w') || type[1] != '\0')
return(NULL); return (NULL);
if (!pids) { if (!pids) {
if ((fds = getdtablesize()) <= 0) if ((fds = sysconf(_SC_OPEN_MAX)) <= 0)
return(NULL); return (NULL);
if (!(pids = calloc(fds, sizeof(PID_T)))) if (!(pids = calloc(fds, sizeof(PID_T))))
return(NULL); return (NULL);
} }
if (pipe(pdes) < 0) if (pipe(pdes) < 0)
return(NULL); return (NULL);
/* break up string into pieces */ /* break up string into pieces */
for (argc = 0, cp = program; argc < MAX_ARGS; cp = NULL) for (argc = 0, cp = program; argc < MAX_ARGS; cp = NULL)
if (!(argv[argc++] = strtok(cp, " \t\n"))) if (!(argv[argc++] = strtok(cp, " \t\n")))
break; break;
argv[MAX_ARGS] = NULL; argv[MAX_ARGS] = NULL;
#if WANT_GLOBBING #if WANT_GLOBBING
▲ Show 20 Lines • Show All 118 Lines • ▼ Show 20 Lines#if WANT_GLOBBING
for (argc = 1; argv[argc] != NULL; argc++) { for (argc = 1; argv[argc] != NULL; argc++) {
/* blkfree((char **)argv[argc]); */ /* blkfree((char **)argv[argc]); */
free((char *)argv[argc]); free((char *)argv[argc]);
} }
#endif #endif
*pidptr = pid; *pidptr = pid;
return(iop); return (iop);
} }
int int
cron_pclose(FILE *iop) cron_pclose(FILE *iop)
{ {
register int fdes; int fdes;
int omask; int omask;
WAIT_T stat_loc; WAIT_T stat_loc;
PID_T pid; PID_T pid;
/* /*
* pclose returns -1 if stream is not associated with a * pclose returns -1 if stream is not associated with a
* `popened' command, or, if already `pclosed'. * `popened' command, or, if already `pclosed'.
*/ */
if (pids == 0 || pids[fdes = fileno(iop)] == 0) if (pids == 0 || pids[fdes = fileno(iop)] == 0)
return(-1); return (-1);
(void)fclose(iop); (void)fclose(iop);
omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP)); omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP));
while ((pid = wait(&stat_loc)) != pids[fdes] && pid != -1) while ((pid = wait(&stat_loc)) != pids[fdes] && pid != -1)
; ;
(void)sigsetmask(omask); (void)sigsetmask(omask);
pids[fdes] = 0; pids[fdes] = 0;
return (pid == -1 ? -1 : WEXITSTATUS(stat_loc)); return (pid == -1 ? -1 : WEXITSTATUS(stat_loc));
} }