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Fix #1072: use internal tmp file to page output

This commit is contained in:
Arun Prakash Jana 2021-06-15 14:38:08 +05:30
parent 4c66a8c0c3
commit a007fe8493
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GPG Key ID: A75979F35C080412
1 changed files with 38 additions and 27 deletions
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65
src/nnn.c
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@ -1996,6 +1996,7 @@ static pid_t xfork(uchar_t flag)
sigaction(SIGINT, &dfl_act, NULL);
sigaction(SIGQUIT, &dfl_act, NULL);
sigaction(SIGTSTP, &dfl_act, NULL);
sigaction(SIGWINCH, &dfl_act, NULL);
setsid();
return p;
@ -2010,6 +2011,7 @@ static pid_t xfork(uchar_t flag)
sigaction(SIGINT, &dfl_act, NULL);
sigaction(SIGQUIT, &dfl_act, NULL);
sigaction(SIGTSTP, &dfl_act, NULL);
sigaction(SIGWINCH, &dfl_act, NULL);
}
/* This is the parent waiting for the child to create grandchild */
@ -4068,7 +4070,6 @@ static void set_smart_ctx(int ctx, char *nextpath, char **path, char **lastname,
/*
* Gets only a single line (that's what we need for now) or shows full command output in pager.
* Uses g_buf internally.
* If page is valid, parses argument 'file' as multi-arg, returns NULL.
*/
static bool get_output(char *file, char *arg1, char *arg2, FILE *fout, bool multi, bool page)
{
@ -4077,8 +4078,22 @@ static bool get_output(char *file, char *arg1, char *arg2, FILE *fout, bool mult
FILE *fin;
int index = 0, flags;
bool ret = FALSE;
bool tmpfile = (!fout && page);
char *argv[EXEC_ARGS_MAX] = {0};
char *cmd = NULL;
int fd = -1;
if (tmpfile) {
fd = create_tmp_file();
if (fd == -1)
return FALSE;
fout = fdopen(fd, "w");
if (!fout) {
close(fd);
return FALSE;
}
}
if (multi) {
cmd = parseargs(file, argv, &index);
@ -4122,36 +4137,32 @@ static bool get_output(char *file, char *arg1, char *arg2, FILE *fout, bool mult
close(pipefd[1]);
free(cmd);
if (!page) {
fin = fdopen(pipefd[0], "r");
if (fin) {
while (fgets(g_buf, CMD_LEN_MAX - 1, fin)) {
ret = TRUE;
if (!fout) /* Read only the first line of output to buffer */
break;
fprintf(fout, "%s", g_buf);
}
fclose(fin);
fin = fdopen(pipefd[0], "r");
if (fin) {
while (fgets(g_buf, CMD_LEN_MAX - 1, fin)) {
ret = TRUE;
if (!fout) /* Read only the first line of output to buffer */
break;
fprintf(fout, "%s", g_buf);
}
close(pipefd[0]);
return ret;
fclose(fin);
}
pid = fork();
if (pid == 0) {
/* Show in pager in child */
dup2(pipefd[0], STDIN_FILENO);
close(pipefd[0]);
spawn(pager, NULL, NULL, NULL, F_CLI | F_FORCE_TTY);
_exit(EXIT_SUCCESS);
}
/* In parent */
waitpid(pid, NULL, 0);
close(pipefd[0]);
if (!page)
return ret;
return FALSE;
if (tmpfile) {
fclose(fout);
close(fd);
}
spawn(pager, g_tmpfpath, NULL, NULL, F_CLI | F_FORCE_TTY);
if (tmpfile)
unlink(g_tmpfpath);
return TRUE;
}
/*
@ -8141,7 +8152,7 @@ int main(int argc, char *argv[])
act.sa_handler = SIG_IGN;
if (sigaction(SIGQUIT, &act, NULL) < 0) {
if (sigaction(SIGQUIT, &act, NULL) < 0 || sigaction(SIGWINCH, &act, NULL) < 0) {
xerror();
return EXIT_FAILURE;
}