diff options
Diffstat (limited to 'shell/hush.c')
| -rw-r--r-- | shell/hush.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/shell/hush.c b/shell/hush.c index 2c4704a..9c0cd7c 100644 --- a/shell/hush.c +++ b/shell/hush.c @@ -471,8 +471,10 @@ struct globals { smallint fake_mode; /* these three support $?, $#, and $1 */ smalluint last_return_code; + /* is global_argv and global_argv[1..n] malloced? (note: not [0]) */ smalluint global_args_malloced; - int global_argc; /* NB: $# + 1 */ + /* how many non-NULL argv's we have. NB: $# + 1 */ + int global_argc; char **global_argv; #if ENABLE_HUSH_LOOPS unsigned depth_break_continue; @@ -4728,9 +4730,14 @@ static int builtin_shift(char **argv) n = atoi(argv[1]); } if (n >= 0 && n < G.global_argc) { - G.global_argv[n] = G.global_argv[0]; + if (G.global_args_malloced) { + int m = 1; + while (m <= n) + free(G.global_argv[m++]); + } G.global_argc -= n; - G.global_argv += n; + memmove(&G.global_argv[1], &G.global_argv[n+1], + G.global_argc * sizeof(G.global_argv[0])); return EXIT_SUCCESS; } return EXIT_FAILURE; |