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Reformat spawn()

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This commit is contained in:
Arun Prakash Jana 2019-03-10 21:44:16 +05:30
parent 59db99f75d
commit 085483ff6d
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GPG key ID: A75979F35C080412
1 changed files with 57 additions and 24 deletions

81
src/nnn.c
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@ -343,6 +343,10 @@ static uchar g_crc;
static uchar BLK_SHIFT = 9;
static bool interrupted = FALSE;
/* Signal handler related */
static sighandler_t oldsighup; /* old value of hangup signal */
static sighandler_t oldsigtstp; /* old value of SIGTSTP */
/* For use in functions which are isolated and don't return the buffer */
static char g_buf[CMD_LEN_MAX] __attribute__ ((aligned));
@ -999,6 +1003,43 @@ static int parseargs(char *line, char **argv)
return count;
}
static pid_t xfork(uchar flag)
{
pid_t p = fork();
if (p > 0) {
/* the parent ignores the interrupt, quit and hangup signals */
oldsighup = signal(SIGHUP, SIG_IGN);
oldsigtstp = signal(SIGTSTP, SIG_DFL);
} else if (p == 0) {
/* so they can be used to stop the child */
signal(SIGHUP, SIG_DFL);
signal(SIGINT, SIG_DFL);
signal(SIGQUIT, SIG_DFL);
signal(SIGTSTP, SIG_DFL);
if (flag & F_NOWAIT)
setsid();
}
if (p == -1)
perror("fork");
return p;
}
static void join(pid_t p, uchar flag)
{
int status;
if (!(flag & F_NOWAIT))
/* wait for the child to exit */
while (waitpid(p, &status, 0) == -1);
/* restore parent's signal handling */
signal(SIGHUP, oldsighup);
signal(SIGTSTP, oldsigtstp);
}
/*
* Spawns a child process. Behaviour can be controlled using flag.
* Limited to 2 arguments to a program, flag works on bit set.
@ -1043,13 +1084,14 @@ static void spawn(char *file, char *arg1, char *arg2, const char *dir, uchar fla
argv[2] = arg2;
}
if (flag & F_NORMAL)
if (flag & F_NORMAL) {
exitcurses();
fflush(stdout);
}
pid = fork();
pid = xfork(flag);
if (pid == 0) {
if (dir != NULL)
if (dir)
status = chdir(dir);
/* Suppress stdout and stderr */
@ -1061,31 +1103,15 @@ static void spawn(char *file, char *arg1, char *arg2, const char *dir, uchar fla
close(fd);
}
if (flag & F_NOWAIT) {
signal(SIGHUP, SIG_IGN);
signal(SIGPIPE, SIG_IGN);
setsid();
}
if (flag & F_SIGINT)
signal(SIGINT, SIG_DFL);
execvp(*argv, argv);
_exit(1);
} else {
if (!(flag & F_NOWAIT))
/* Ignore interruptions */
while (waitpid(pid, &status, 0) == -1)
DPRINTF_D(status);
join(pid, flag);
DPRINTF_D(pid);
if (flag & F_NORMAL) {
refresh();
if (flag & F_EDIT) {
exitcurses();
fflush(stdout);
initcurses();
}
nonl();
noecho();
}
free(cmd);
@ -3520,7 +3546,14 @@ nochange:
printmsg("selection off");
goto nochange;
case SEL_COPYLIST:
copybufpos ? showcplist() : printmsg("none selected");
if (copybufpos) {
showcplist();
if (cfg.filtermode)
presel = FILTER;
break;
}
printmsg("none selected");
goto nochange;
case SEL_CP:
case SEL_MV: