From 6efc48c1aebfc7bebd05c6f9c21cc0f9014abbd0 Mon Sep 17 00:00:00 2001 From: Eric Andersen Date: Tue, 18 Jul 2000 08:16:39 +0000 Subject: Sigh -- can't sleep. Clean up some mem leaks, fixed some bugs. -Erik --- shell/lash.c | 82 +++++++++++++++++++++++++++++++----------------------------- 1 file changed, 43 insertions(+), 39 deletions(-) (limited to 'shell') diff --git a/shell/lash.c b/shell/lash.c index c9ef39f49..6029eaa5c 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') { -- cgit v1.2.3