diff options
Diffstat (limited to 'Src/exec.c')
| -rw-r--r-- | Src/exec.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/Src/exec.c b/Src/exec.c index 9b3c50372..44fcbdd9f 100644 --- a/Src/exec.c +++ b/Src/exec.c @@ -2487,6 +2487,11 @@ execcmd(Estate state, int input, int output, int how, int last1) * with the zsh style. */ while (next && *next == '-' && strlen(next) >= 2) { + if (!firstnode(args)) { + zerr("exec requires a command to execute"); + errflag = lastval = 1; + return; + } uremnode(args, firstnode(args)); if (!strcmp(next, "--")) break; @@ -2499,6 +2504,11 @@ execcmd(Estate state, int input, int output, int how, int last1) /* position on last non-NULL character */ cmdopt += strlen(cmdopt+1); } else { + if (!firstnode(args)) { + zerr("exec requires a command to execute"); + errflag = lastval = 1; + return; + } if (!nextnode(firstnode(args))) { zerr("exec flag -a requires a parameter"); errflag = lastval = 1; @@ -2521,7 +2531,8 @@ execcmd(Estate state, int input, int output, int how, int last1) return; } } - next = (char *) getdata(nextnode(firstnode(args))); + if (firstnode(args) && nextnode(firstnode(args))) + next = (char *) getdata(nextnode(firstnode(args))); } if (exec_argv0) { char *str, *s; |