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-rw-r--r--libbb/xfuncs.c34
1 files changed, 34 insertions, 0 deletions
diff --git a/libbb/xfuncs.c b/libbb/xfuncs.c
index d3c9e41e1..2cfafb01a 100644
--- a/libbb/xfuncs.c
+++ b/libbb/xfuncs.c
@@ -182,3 +182,37 @@ void bb_xfflush_stdout(void)
182 } 182 }
183} 183}
184#endif 184#endif
185
186#ifdef L_spawn
187// This does a fork/exec in one call, using vfork().
188pid_t bb_spawn(char **argv)
189{
190 static int failed;
191 pid_t pid;
192
193 // Be nice to nommu machines.
194 failed = 0;
195 pid = vfork();
196 if (pid < 0) return pid;
197 if (!pid) {
198 execvp(*argv, argv);
199
200 // We're sharing a stack with blocked parent, let parent know we failed
201 // and then exit to unblock parent (but don't run atexit() stuff, which
202 // would screw up parent.)
203
204 failed = -1;
205 _exit(0);
206 }
207 return failed ? failed : pid;
208}
209#endif
210
211#ifdef L_xspawn
212pid_t bb_xspawn(char **argv)
213{
214 pid_t pid = bb_spawn(argv);
215 if (pid < 0) bb_perror_msg_and_die("%s", *argv);
216 return pid;
217}
218#endif