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Diffstat (limited to 'shell')
-rw-r--r--shell/lash.c82
1 files changed, 43 insertions, 39 deletions
diff --git a/shell/lash.c b/shell/lash.c
index c9ef39f..6029eaa 100644
--- a/shell/lash.c
+++ b/shell/lash.c
@@ -46,10 +46,7 @@
#include "cmdedit.h"
#endif
-#define bb_need_full_version
-#define BB_DECLARE_EXTERN
-#include "messages.c"
-
+#define MAX_LINE 256 /* size of input buffer for `read' builtin */
#define MAX_READ 128 /* size of input buffer for `read' builtin */
#define JOB_STATUS_FORMAT "[%d] %-22s %.40s\n"
@@ -147,7 +144,7 @@ static struct builtInCommand bltins_forking[] = {
};
static char *prompt = "# ";
-static char *cwd = NULL;
+static char *cwd;
static char *local_pending_command = NULL;
#ifdef BB_FEATURE_SH_COMMAND_EDITING
@@ -175,7 +172,7 @@ static int builtin_cd(struct job *cmd, struct jobSet *junk)
printf("cd: %s: %s\n", newdir, strerror(errno));
return FALSE;
}
- getcwd(cwd, sizeof(cwd));
+ getcwd(cwd, sizeof(char)*MAX_LINE);
return TRUE;
}
@@ -289,7 +286,7 @@ static int builtin_jobs(struct job *dummy, struct jobSet *jobList)
/* built-in 'pwd' handler */
static int builtin_pwd(struct job *dummy, struct jobSet *junk)
{
- getcwd(cwd, sizeof(cwd));
+ getcwd(cwd, sizeof(char)*MAX_LINE);
fprintf(stdout, "%s\n", cwd);
return TRUE;
}
@@ -780,13 +777,8 @@ static int parseCommand(char **commandPtr, struct job *job, struct jobSet *jobLi
return 1;
}
- /* Make a copy of any stuff left over in the command
- * line after the second backtick */
- charptr2 = xmalloc(strlen(ptr)+1);
- memcpy(charptr2, ptr+1, strlen(ptr));
-
/* Make some space to hold just the backticked command */
- charptr1 = xmalloc(1+ptr-src);
+ charptr1 = charptr2 = xmalloc(1+ptr-src);
snprintf(charptr1, 1+ptr-src, src);
newJob = xmalloc(sizeof(struct job));
/* Now parse and run the backticked command */
@@ -796,7 +788,14 @@ static int parseCommand(char **commandPtr, struct job *job, struct jobSet *jobLi
runCommand(newJob, &njobList, 0, pipefd);
}
checkJobs(jobList);
- free(charptr1);
+ freeJob(newJob);
+ free(charptr2);
+
+ /* Make a copy of any stuff left over in the command
+ * line after the second backtick */
+ charptr2 = xmalloc(strlen(ptr)+1);
+ memcpy(charptr2, ptr+1, strlen(ptr));
+
/* Copy the output from the backtick-ed command into the
* command line, making extra room as needed */
@@ -819,13 +818,12 @@ static int parseCommand(char **commandPtr, struct job *job, struct jobSet *jobLi
/* Now paste into the *commandPtr all the stuff
* leftover after the second backtick */
memcpy(src, charptr2, strlen(charptr2));
- fprintf(stderr,"*commandPtr='%s'\n", *commandPtr);
free(charptr2);
-
/* Now recursively call parseCommand to deal with the new
* and improved version of the command line with the backtick
* results expanded in place... */
+ freeJob(job);
return(parseCommand(commandPtr, job, jobList, isBg));
}
break;
@@ -863,24 +861,29 @@ static int parseCommand(char **commandPtr, struct job *job, struct jobSet *jobLi
return 0;
}
-
static int runCommand(struct job *newJob, struct jobSet *jobList, int inBg, int outPipe[2])
{
struct job *job;
- int nextin=0, nextout, stdoutfd=fileno(stdout);
int i;
+ int nextin, nextout;
int pipefds[2]; /* pipefd[0] is for reading */
struct builtInCommand *x;
#ifdef BB_FEATURE_SH_STANDALONE_SHELL
const struct BB_applet *a = applets;
#endif
+
+ nextin = 0, nextout = 1;
for (i = 0; i < newJob->numProgs; i++) {
if ((i + 1) < newJob->numProgs) {
pipe(pipefds);
nextout = pipefds[1];
} else {
- nextout = stdoutfd;
+ if (outPipe[1]!=-1) {
+ nextout = outPipe[1];
+ } else {
+ nextout = 1;
+ }
}
/* Check if the command matches any non-forking builtins */
@@ -895,15 +898,18 @@ static int runCommand(struct job *newJob, struct jobSet *jobList, int inBg, int
if (outPipe[1]!=-1) {
close(outPipe[0]);
- nextout = stdoutfd = outPipe[1];
+ }
+ if (nextin != 0) {
+ dup2(nextin, 0);
+ close(nextin);
+ }
+
+ if (nextout != 1) {
dup2(nextout, 1);
dup2(nextout, 2);
close(nextout);
}
- //dup2(nextin, 0);
- //close(nextin);
-
/* explicit redirections override pipes */
setupRedirections(newJob->progs + i);
@@ -915,8 +921,8 @@ static int runCommand(struct job *newJob, struct jobSet *jobList, int inBg, int
}
#ifdef BB_FEATURE_SH_STANDALONE_SHELL
/* Check if the command matches any busybox internal commands here */
- /* TODO: Add matching on commands with paths appended (i.e. 'cat'
- * currently works, but '/bin/cat' doesn't ) */
+ /* TODO: Add matching when paths are appended (i.e. 'cat' currently
+ * works, but '/bin/cat' doesn't ) */
while (a->name != 0) {
if (strcmp(newJob->progs[i].argv[0], a->name) == 0) {
int argc;
@@ -929,20 +935,19 @@ static int runCommand(struct job *newJob, struct jobSet *jobList, int inBg, int
#endif
execvp(newJob->progs[i].argv[0], newJob->progs[i].argv);
- fatalError("%s: %s\n", newJob->progs[i].argv[0],
+ fatalError("sh: %s: %s\n", newJob->progs[i].argv[0],
strerror(errno));
}
- if (outPipe[1]!=-1) {
+ if (outPipe[1]!=-1) {
close(outPipe[1]);
}
/* put our child in the process group whose leader is the
first process in this pipe */
setpgid(newJob->progs[i].pid, newJob->progs[0].pid);
-
if (nextin != 0)
close(nextin);
- if (nextout != stdoutfd)
+ if (nextout != 1)
close(nextout);
/* If there isn't another process, nextin is garbage
@@ -960,10 +965,10 @@ static int runCommand(struct job *newJob, struct jobSet *jobList, int inBg, int
/* add the job to the list of running jobs */
if (!jobList->head) {
- job = jobList->head = xmalloc(sizeof(*job));
+ job = jobList->head = malloc(sizeof(*job));
} else {
for (job = jobList->head; job->next; job = job->next);
- job->next = xmalloc(sizeof(*job));
+ job->next = malloc(sizeof(*job));
job = job->next;
}
@@ -1066,9 +1071,9 @@ static int busy_loop(FILE * input)
int pipefds[2] = {-1,-1};
runCommand(&newJob, &jobList, inBg, pipefds);
} else {
- nextCommand=NULL;
free(command);
command = (char *) calloc(BUFSIZ, sizeof(char));
+ nextCommand = NULL;
}
} else {
/* a job is running in the foreground; wait for it */
@@ -1123,16 +1128,14 @@ static int busy_loop(FILE * input)
}
+
int shell_main(int argc, char **argv)
{
FILE *input = stdin;
- /* initialize the cwd */
- cwd = (char *) calloc(BUFSIZ, sizeof(char));
- if (cwd == 0) {
- fatalError("out of memory\n");
- }
- getcwd(cwd, sizeof(char)*BUFSIZ);
+ /* initialize the cwd -- this is never freed...*/
+ cwd=(char*)xmalloc(sizeof(char)*MAX_LINE+1);
+ getcwd(cwd, sizeof(char)*MAX_LINE);
#ifdef BB_FEATURE_SH_COMMAND_EDITING
cmdedit_init();
@@ -1144,8 +1147,9 @@ int shell_main(int argc, char **argv)
// builtin_source("/etc/profile");
//}
+
if (argc < 2) {
- fprintf(stdout, "\n\n%s Built-in shell\n", full_version);
+ 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][0]=='-' && argv[1][1]=='c') {
generated by cgit v1.1 at 2024-12-27 06:59:59 +0000