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Fix #179

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Arun Prakash Jana 2019-03-10 11:13:12 +05:30
parent 1c9934ab7f
commit 616443ffa3
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GPG key ID: A75979F35C080412
1 changed files with 70 additions and 56 deletions
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126
src/nnn.c
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@ -186,6 +186,7 @@ disabledbg()
#define CTX_MAX 4
#define DOT_FILTER_LEN 7
#define ASCII_MAX 128
#define EXEC_ARGS_MAX 8
/* Entry flags */
#define DIR_OR_LINK_TO_DIR 0x1
@ -198,6 +199,7 @@ disabledbg()
#define F_NOTRACE 0x04 /* suppress stdout and strerr (no traces) */
#define F_SIGINT 0x08 /* restore default SIGINT handler */
#define F_EDITOR 0x10 /* spawn the editor */
#define F_MULTI 0x20 /* first arg can be combination of args */
#define F_NORMAL 0x80 /* spawn child process in non-curses regular CLI mode */
/* CRC8 macros */
@ -491,7 +493,7 @@ static const char * const envs[] = {
/* Forward declarations */
static void redraw(char *path);
static void spawn(const char *file, const char *arg1, const char *arg2, const char *dir, uchar flag);
static void spawn(char *file, char *arg1, char *arg2, const char *dir, uchar flag);
static int (*nftw_fn)(const char *fpath, const struct stat *sb, int typeflag, struct FTW *ftwbuf);
/* Functions */
@ -969,23 +971,77 @@ static bool initcurses(void)
return TRUE;
}
/* NOTE: There's no NULL check here */
static int parseargs(char *line, char **argv)
{
int count = 0;
argv[count++] = line;
while (*line) {
if (isblank(*line)) {
*line++ = '\0';
if (!*line)
return count;
argv[count++] = line;
if (count == EXEC_ARGS_MAX)
return -1;
}
++line;
}
return count;
}
/*
* Spawns a child process. Behaviour can be controlled using flag.
* Limited to 2 arguments to a program, flag works on bit set.
*/
static void spawn(const char *file, const char *arg1, const char *arg2, const char *dir, uchar flag)
static void spawn(char *file, char *arg1, char *arg2, const char *dir, uchar flag)
{
pid_t pid;
int status;
const char *tmp;
char *argv[EXEC_ARGS_MAX] = {0};
char *cmd = NULL;
if (!file || !file[0])
return;
/* Swap args if the first arg is NULL and second isn't */
if (!arg1 && arg2) {
tmp = arg1;
arg1 = arg2;
arg2 = tmp;
arg2 = NULL;
}
if (flag & F_MULTI) {
size_t len = strlen(file) + 1;
cmd = (char *)malloc(len);
if (!cmd) {
DPRINTF_S("spawn: malloc()!");
return;
}
xstrlcpy(cmd, file, len);
argv[0] = file;
status = parseargs(cmd, argv);
if (status == -1 || status > (EXEC_ARGS_MAX - 2)) { /* arg1 and last NULL */
free(cmd);
DPRINTF_S("spawn: NULL or too many args");
return;
}
argv[status] = arg1;
} else {
argv[0] = file;
argv[1] = arg1;
argv[2] = arg2;
}
if (flag & F_NORMAL)
exitcurses();
@ -1012,7 +1068,7 @@ static void spawn(const char *file, const char *arg1, const char *arg2, const ch
if (flag & F_SIGINT)
signal(SIGINT, SIG_DFL);
execlp(file, file, arg1, arg2, NULL);
execvp(*argv, argv);
_exit(1);
} else {
if (!(flag & F_NOWAIT))
@ -1029,52 +1085,11 @@ static void spawn(const char *file, const char *arg1, const char *arg2, const ch
initcurses();
}
}
free(cmd);
}
}
/*
* Quotes argument and spawns a shell command
* Uses g_buf
*/
static bool quote_run_sh_cmd(const char *cmd, const char *arg, const char *path)
{
const char *ptr;
size_t r;
if (!cmd)
return FALSE;
r = xstrlcpy(g_buf, cmd, CMD_LEN_MAX);
if (arg) {
if (r >= CMD_LEN_MAX - 4) { /* space for at least 4 chars - space'c' */
printmsg(messages[STR_UNSAFE]);
return FALSE;
}
for (ptr = arg; *ptr; ++ptr)
if (*ptr == '\'') {
printmsg(messages[STR_UNSAFE]);
return FALSE;
}
g_buf[r - 1] = ' ';
g_buf[r] = '\'';
r += xstrlcpy(g_buf + r + 1, arg, CMD_LEN_MAX - 1 - r);
if (r >= CMD_LEN_MAX - 1) {
printmsg(messages[STR_UNSAFE]);
return FALSE;
}
g_buf[r] = '\'';
g_buf[r + 1] = '\0';
}
DPRINTF_S(g_buf);
spawn("sh", "-c", g_buf, path, F_NORMAL | F_EDITOR);
return TRUE;
}
/* Get program name from env var, else return fallback program */
static char *xgetenv(const char *name, char *fallback)
{
@ -2318,7 +2333,7 @@ static bool show_mediainfo(const char *fpath, const char *arg)
return TRUE;
}
static bool handle_archive(const char *fpath, const char *arg, const char *dir)
static bool handle_archive(char *fpath, char *arg, const char *dir)
{
if (!getutil(utils[ATOOL]))
return FALSE;
@ -3008,8 +3023,8 @@ nochange:
get_output(g_buf, CMD_LEN_MAX, "file", FILE_OPTS, newpath, FALSE)
&& g_buf[0] == 't' && g_buf[1] == 'e' && g_buf[2] == 'x'
&& g_buf[3] == g_buf[0] && g_buf[4] == '/') {
if (!quote_run_sh_cmd(editor, newpath, path))
goto nochange;
spawn(editor, newpath, NULL, path,
F_NORMAL | F_EDITOR | F_MULTI);
continue;
}
@ -3355,8 +3370,8 @@ nochange:
r = show_help(path);
break;
case SEL_RUNEDIT:
if (!quote_run_sh_cmd(editor, dents[cur].name, path))
goto nochange;
spawn(editor, dents[cur].name, NULL, path,
F_NORMAL | F_EDITOR |F_MULTI);
break;
case SEL_RUNPAGE:
spawn(pager, pager_arg, dents[cur].name, path, F_NORMAL);
@ -3371,8 +3386,7 @@ nochange:
goto nochange;
}
if (!quote_run_sh_cmd(editor, notepath, NULL))
goto nochange;
spawn(editor, notepath, NULL, path, F_NORMAL | F_EDITOR |F_MULTI);
break;
}
default: /* SEL_LOCK */