GNUnet  0.10.x
Functions | Variables
gnunet-timeout.c File Reference

small tool starting a child process, waiting that it terminates or killing it after a given timeout period More...

#include <sys/types.h>
#include <sys/wait.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
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Functions

static void sigchld_handler (int val)
 
static void sigint_handler (int val)
 
int main (int argc, char *argv[])
 

Variables

static pid_t child
 

Detailed Description

small tool starting a child process, waiting that it terminates or killing it after a given timeout period

Author
Matthias Wachs

Definition in file gnunet-timeout.c.

Function Documentation

◆ sigchld_handler()

static void sigchld_handler ( int  val)
static

Definition at line 38 of file gnunet-timeout.c.

References child, ret, and status.

Referenced by main().

39 {
40  int status = 0;
41  int ret = 0;
42 
43  (void)val;
44  waitpid(child, &status, 0);
45  if (WIFEXITED(status) != 0)
46  {
47  ret = WEXITSTATUS(status);
48  fprintf(stderr, "Process exited with result %u\n", ret);
49  _exit(ret); /* return same status code */
50  }
51  if (WIFSIGNALED(status) != 0)
52  {
53  ret = WTERMSIG(status);
54  fprintf(stderr, "Process received signal %u\n", ret);
55  kill(getpid(), ret); /* kill self with the same signal */
56  }
57  _exit(-1);
58 }
static pid_t child
static int ret
Final status code.
Definition: gnunet-arm.c:89
uint16_t status
See PRISM_STATUS_*-constants.
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◆ sigint_handler()

static void sigint_handler ( int  val)
static

Definition at line 62 of file gnunet-timeout.c.

Referenced by main().

63 {
64  kill(0, val);
65  _exit(val);
66 }
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◆ main()

int main ( int  argc,
char *  argv[] 
)

Definition at line 70 of file gnunet-timeout.c.

References child, sigchld_handler(), sigint_handler(), and timeout.

71 {
72  int timeout = 0;
73  pid_t gpid = 0;
74 
75  if (argc < 3)
76  {
77  fprintf(stderr,
78  "arg 1: timeout in sec., arg 2: executable, arg<n> arguments\n");
79  exit(-1);
80  }
81 
82  timeout = atoi(argv[1]);
83 
84  if (timeout == 0)
85  timeout = 600;
86 
87  /* with getpgid() it does not compile, but getpgrp is the BSD version and working */
88  gpid = getpgrp();
89 
90  signal(SIGCHLD, sigchld_handler);
91  signal(SIGABRT, sigint_handler);
92  signal(SIGFPE, sigint_handler);
93  signal(SIGILL, sigint_handler);
94  signal(SIGINT, sigint_handler);
95  signal(SIGSEGV, sigint_handler);
96  signal(SIGTERM, sigint_handler);
97 
98  child = fork();
99  if (child == 0)
100  {
101  /* int setpgrp(pid_t pid, pid_t pgid); is not working on this machine */
102  //setpgrp (0, pid_t gpid);
103  if (-1 != gpid)
104  setpgid(0, gpid);
105  execvp(argv[2], &argv[2]);
106  exit(-1);
107  }
108  if (child > 0)
109  {
110  sleep(timeout);
111  printf("Child processes were killed after timeout of %u seconds\n",
112  timeout);
113  kill(0, SIGTERM);
114  exit(3);
115  }
116  exit(-1);
117 }
static pid_t child
static void sigint_handler(int val)
static struct GNUNET_TIME_Relative timeout
User defined timestamp for completing operations.
Definition: gnunet-arm.c:114
static void sigchld_handler(int val)
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Variable Documentation

◆ child

pid_t child
static

Definition at line 34 of file gnunet-timeout.c.

Referenced by main(), and sigchld_handler().