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* Fixed a _horrible_ bug where 'tar -tvf' could unlink

Browse Source 
local files!!!  Fix thanks to Marius Groeger <mgroeger@sysgo.de>
* Added support for "sh -c command args...", also thanks to
    Marius Groeger <mgroeger@sysgo.de>

 -Erik
This commit is contained in:
Eric Andersen
2000-06-28 16:56:25 +00:00
parent 47cac6779a
commit 1c314ad655
6 changed files with 177 additions and 63 deletions
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76
lash.c
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@@ -131,8 +131,8 @@ static struct builtInCommand bltins_forking[] = {
};
static const char shell_usage[] =
"sh [FILE]...\n"
"sh [FILE]...\n"
" or: sh -c command [args]...\n"
#ifndef BB_FEATURE_TRIVIAL_HELP
"\nlash: The BusyBox command interpreter (shell).\n\n"
#endif
@@ -140,6 +140,7 @@ static const char shell_usage[] =
static char cwd[1024];
static char *prompt = "# ";
static char *local_pending_command = NULL;
#ifdef BB_FEATURE_SH_COMMAND_EDITING
void win_changed(int sig)
@@ -225,8 +226,9 @@ static int shell_fg_bg(struct job *cmd, struct jobSet *jobList)
if (*cmd->progs[0].argv[0] == 'f') {
/* Make this job the foreground job */
if (tcsetpgrp(0, job->pgrp))
perror("tcsetpgrp");
/* suppress messages when run from /linuxrc mag@sysgo.de */
if (tcsetpgrp(0, job->pgrp) && errno != ENOTTY)
perror("tcsetpgrp");
jobList->fg = job;
}
@@ -411,6 +413,17 @@ static void checkJobs(struct jobSet *jobList)
static int getCommand(FILE * source, char *command)
{
if (source == NULL) {
if (local_pending_command) {
/* a command specified (-c option): return it & mark it done */
strcpy(command, local_pending_command);
free(local_pending_command);
local_pending_command = NULL;
return 0;
}
return 1;
}
if (source == stdin) {
#ifdef BB_FEATURE_SH_COMMAND_EDITING
int len;
@@ -842,7 +855,8 @@ static int runCommand(struct job newJob, struct jobSet *jobList, int inBg)
jobList->fg = job;
/* move the new process group into the foreground */
if (tcsetpgrp(0, newJob.pgrp))
/* suppress messages when run from /linuxrc mag@sysgo.de */
if (tcsetpgrp(0, newJob.pgrp) && errno != ENOTTY)
perror("tcsetpgrp");
}
@@ -894,10 +908,14 @@ static int busy_loop(FILE * input)
char *nextCommand = NULL;
struct jobSet jobList = { NULL, NULL };
struct job newJob;
pid_t parent_pgrp;
int i;
int status;
int inBg;
/* save current owner of TTY so we can restore it on exit */
parent_pgrp = tcgetpgrp(0);
command = (char *) calloc(BUFSIZ, sizeof(char));
/* don't pay any attention to this signal; it just confuses
@@ -939,10 +957,6 @@ static int busy_loop(FILE * input)
removeJob(&jobList, jobList.fg);
jobList.fg = NULL;
/* move the shell to the foreground */
if (tcsetpgrp(0, getpid()))
perror("tcsetpgrp");
}
} else {
/* the child was stopped */
@@ -958,13 +972,18 @@ static int busy_loop(FILE * input)
if (!jobList.fg) {
/* move the shell to the foreground */
if (tcsetpgrp(0, getpid()))
perror("tcsetpgrp");
/* suppress messages when run from /linuxrc mag@sysgo.de */
if (tcsetpgrp(0, getpid()) && errno != ENOTTY)
perror("tcsetpgrp");
}
}
}
free(command);
/* return controlling TTY back to parent process group before exiting */
if (tcsetpgrp(0, parent_pgrp))
perror("tcsetpgrp");
return 0;
}
@@ -973,9 +992,6 @@ int shell_main(int argc, char **argv)
{
FILE *input = stdin;
if (argc > 2) {
usage(shell_usage);
}
/* initialize the cwd */
getcwd(cwd, sizeof(cwd));
@@ -993,13 +1009,33 @@ int shell_main(int argc, char **argv)
fprintf(stdout, "\n\nBusyBox v%s (%s) Built-in shell\n", BB_VER, BB_BT);
fprintf(stdout, "Enter 'help' for a list of built-in commands.\n\n");
} else {
if (*argv[1]=='-') {
usage("sh\n\nlash -- the BusyBox LAme SHell (command interpreter)\n");
if (argv[1][0]=='-' && argv[1][1]=='c') {
int i;
local_pending_command = (char *) calloc(BUFSIZ, sizeof(char));
if (local_pending_command == 0) {
fatalError("sh: out of memory\n");
}
for(i=2; i<argc; i++)
{
if (strlen(local_pending_command) + strlen(argv[i]) >= BUFSIZ) {
fatalError("sh: commands for -c option too long\n");
}
strcat(local_pending_command, argv[i]);
if (i + 1 < argc)
strcat(local_pending_command, " ");
}
input = NULL;
}
input = fopen(argv[1], "r");
if (!input) {
fatalError("sh: Couldn't open file '%s': %s\n", argv[1],
strerror(errno));
else if (argv[1][0]=='-') {
usage(shell_usage);
}
else {
input = fopen(argv[1], "r");
if (!input) {
fatalError("sh: Couldn't open file '%s': %s\n", argv[1],
strerror(errno));
}
}
}