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- /*
- * Copyright (c) 1993 by David I. Bell
- * Permission is granted to use, distribute, or modify this source,
- * provided that this copyright notice remains intact.
- *
- * Stand-alone shell for system maintainance for Linux.
- * This program should NOT be built using shared libraries.
- *
- * 1.1.1, hacked to re-allow cmd line invocation of script file
- * Pat Adamo, padamo@unix.asb.com
- */
- #include "sash.h"
- #ifndef CMD_HELP
- #define CMD_HELP
- #endif
- #undef INTERNAL_PATH_EXPANSION
- #define FAVOUR_EXTERNAL_COMMANDS
- #include <stdlib.h>
- #include <signal.h>
- #include <errno.h>
- #include <unistd.h>
- #include <sys/stat.h>
- #include <sys/time.h>
- #include <sys/wait.h>
- static char version[] = "1.1.1";
- extern int intflag;
- extern void do_test();
- typedef struct {
- char name[10];
- char usage[30];
- void (*func)();
- int minargs;
- int maxargs;
- } CMDTAB;
- CMDTAB cmdtab[] = {
- /*
- "alias", "[name [command]]", do_alias,
- 1, MAXARGS,
- */
- "cd", "[dirname]", do_cd,
- 1, 2,
-
- "sleep", "seconds", do_sleep,
- 1, 2,
- "chgrp", "gid filename ...", do_chgrp,
- 3, MAXARGS,
- "chmod", "mode filename ...", do_chmod,
- 3, MAXARGS,
- "chown", "uid filename ...", do_chown,
- 3, MAXARGS,
- "cmp", "filename1 filename2", do_cmp,
- 3, 3,
- "cp", "srcname ... destname", do_cp,
- 3, MAXARGS,
- /*
- "dd", "if=name of=name [bs=n] [count=n] [skip=n] [seek=n]", do_dd,
- 3, MAXARGS,
- */
- "df", "[file-system]", do_df,
- 1, 2,
- "echo", "[args] ...", do_echo,
- 1, MAXARGS,
- /*
- "ed", "[filename]", do_ed,
- 1, 2,
- */
- "exec", "filename [args]", do_exec,
- 2, MAXARGS,
- "exit", "", do_exit,
- 1, 1,
- "free", "", do_free,
- 1, 1,
- /*
- "-grep", "[-in] word filename ...", do_grep,
- 3, MAXARGS,
- */
- #ifdef CMD_HELP
- "help", "", do_help,
- 1, MAXARGS,
- #endif
- "hexdump", "[-s pos] filename", do_hexdump,
- 1, 4,
- "hostname", "[hostname]", do_hostname,
- 1, 2,
- "kill", "[-sig] pid ...", do_kill,
- 2, MAXARGS,
- "ln", "[-s] srcname ... destname", do_ln,
- 3, MAXARGS,
- "ls", "[-lidC] filename ...", do_ls,
- 1, MAXARGS,
- "mkdir", "dirname ...", do_mkdir,
- 2, MAXARGS,
- "mknod", "filename type major minor", do_mknod,
- 5, 5,
- "more", "filename ...", do_more,
- 2, MAXARGS,
- "mount", "[-t type] devname dirname", do_mount,
- 3, MAXARGS,
- "mv", "srcname ... destname", do_mv,
- 3, MAXARGS,
- "printenv", "[name]", do_printenv,
- 1, 2,
- "pwd", "", do_pwd,
- 1, 1,
- "pid", "", do_pid,
- 1, 1,
- "quit", "", do_exit,
- 1, 1,
- "rm", "filename ...", do_rm,
- 2, MAXARGS,
- "rmdir", "dirname ...", do_rmdir,
- 2, MAXARGS,
- "setenv", "name value", do_setenv,
- 3, 3,
- "source", "filename", do_source,
- 2, 2,
- "sync", "", do_sync,
- 1, 1,
- /* "time", "", do_time,
- 1, 1,
- */
- /*
- "tar", "[xtv]f devname filename ...", do_tar,
- 2, MAXARGS,
- */
- "touch", "filename ...", do_touch,
- 2, MAXARGS,
- "umask", "[mask]", do_umask,
- 1, 2,
- "umount", "filename", do_umount,
- 2, 2,
- /*
- "unalias", "name", do_unalias,
- 2, 2,
- */
- #ifdef CONFIG_USER_SASH_PS
- "ps", "", do_ps,
- 1, MAXARGS,
- #endif
- /* "reboot", "", do_reboot,
- 1, MAXARGS,
- */
- "cat", "filename ...", do_cat,
- 2, MAXARGS,
- "date", "date [MMDDhhmm[YYYY]]", do_date,
- 1, 2,
- 0, 0, 0,
- 0, 0
- };
- typedef struct {
- char *name;
- char *value;
- } ALIAS;
- static ALIAS *aliastable;
- static int aliascount;
- static FILE *sourcefiles[MAXSOURCE];
- static int sourcecount;
- volatile static BOOL intcrlf = TRUE;
- static void catchint();
- static void catchquit();
- static void catchchild();
- static void readfile();
- static void command();
- #ifdef COMMAND_HISTORY
- #define do_command(c,h) command(c,h)
- #else
- #define do_command(c,h) command(c)
- #endif
- static void runcmd();
- static void showprompt();
- static BOOL trybuiltin();
- static BOOL command_in_path();
- static ALIAS *findalias();
- extern char ** environ;
- /*
- char text1[] = "Text";
- char * text2 = text1;
- char ** text3 = &text2;
- */
- char buf[CMDLEN];
- int exit_code = 0;
- main(argc, argv, env)
- char **argv;
- char *env[];
- {
- struct sigaction act;
- char *cp;
- /* char buf[PATHLEN];*/
- int dofile = 0;
-
- if ((argc > 1) && !strcmp(argv[1], "-c")) {
- /* We are that fancy a shell */
- buf[0] = '\0';
- for (dofile = 2; dofile < argc; dofile++) {
- strncat(buf, argv[dofile], sizeof(buf));
- if (dofile + 1 < argc)
- strncat(buf, " ", sizeof(buf));
- }
- do_command(buf, FALSE);
- exit(exit_code);
- }
- //;'pa990523 +
- if ((argc > 1) && strcmp(argv[1], "-t"))
- {
- dofile++;
- printf("Shell invoked to run file: %s\n",argv[1]);
- }
- else
- printf("\nSash command shell (version %s)\n", version);
- fflush(stdout);
- signal(SIGINT, catchint);
- signal(SIGQUIT, catchquit);
- memset(&act, 0, sizeof(act));
- act.sa_handler = catchchild;
- act.sa_flags = SA_RESTART;
- sigaction(SIGCHLD, &act, NULL);
- if (getenv("PATH") == NULL)
- putenv("PATH=/bin:/usr/bin:/etc:/sbin:/usr/sbin");
- /* cp = getenv("HOME");
- if (cp) {
- strcpy(buf, cp);
- strcat(buf, "/");
- strcat(buf, ".aliasrc");
- if ((access(buf, 0) == 0) || (errno != ENOENT))
- readfile(buf);
- }
- */
- //;'pa990523 -1/+
- //readfile(NULL);
- if (dofile)
- {
- //open the file for reading!
- readfile(argv[1]);
- }
- else
- {
- readfile(NULL); //no arguments!
- } //end if arguments supplied
- exit(exit_code);
- }
- /*
- * Read commands from the specified file.
- * A null name pointer indicates to read from stdin.
- */
- static void
- readfile(name)
- char *name;
- {
- FILE *fp;
- int cc;
- BOOL ttyflag;
- char *ptr;
- if (sourcecount >= MAXSOURCE) {
- fprintf(stderr, "Too many source files\n");
- return;
- }
- fp = stdin;
- if (name) {
- fp = fopen(name, "r");
- if (fp == NULL) {
- perror(name);
- return;
- }
- }
- sourcefiles[sourcecount++] = fp;
- ttyflag = isatty(fileno(fp));
- while (TRUE) {
- fflush(stdout);
- //;'pa990523 -1/+1
- //if (1)
- if (fp == stdin) //using terminal, so show prompt
- showprompt();
- if (intflag && !ttyflag && (fp != stdin)) {
- fclose(fp);
- sourcecount--;
- return;
- }
- if (fgets(buf, CMDLEN - 1, fp) == NULL) {
- if (ferror(fp) && (errno == EINTR)) {
- clearerr(fp);
- continue;
- }
- break;
- }
- cc = strlen(buf);
- while ((cc > 0) && isspace(buf[cc - 1]))
- cc--;
- buf[cc] = '\0';
- /* remove leading spaces and look for a '#' */
- ptr = &buf[0];
- while (*ptr == ' ') {
- ptr++;
- }
- if (*ptr != '#') {
- //;'pa990523 +
- if (fp != stdin) {
- //taking commands from file - echo
- printf("Command: %s\n",buf);
- } //end if (fp != stdin)
- do_command(buf, fp == stdin);
- }
- }
- if (ferror(fp)) {
- perror("Reading command line");
- if (fp == stdin)
- exit(1);
- }
- clearerr(fp);
- if (fp != stdin)
- {//;'pa990523 added braces and printf
- fclose(fp);
- printf("Execution Finished, Exiting\n");
- } //end if (fp != stdin)
- sourcecount--;
- }
- /*
- * Parse and execute one null-terminated command line string.
- * This breaks the command line up into words, checks to see if the
- * command is an alias, and expands wildcards.
- */
- static void
- #ifdef COMMAND_HISTORY
- command(cmd, do_history)
- int do_history;
- #else
- command(cmd)
- #endif
- char *cmd;
- {
- ALIAS *alias;
- char **argv;
- int argc;
- int bg;
- char *c;
- char last_exit_code[10];
- sprintf(last_exit_code, "%d", exit_code);
- intflag = FALSE;
- exit_code = 0;
- freechunks();
- while (isblank(*cmd))
- cmd++;
- #ifdef COMMAND_HISTORY
- if (do_history) {
- int i;
- static char *history[HISTORY_SIZE];
- if (*cmd == '!') {
- if (cmd[1] == '!')
- i = 0;
- else {
- i = atoi(cmd+1) - 1;
- if (i < 0 || i >= HISTORY_SIZE) {
- printf("%s: Out of range\n", cmd);
- return;
- }
- }
- if (history[i] == NULL) {
- printf("%s: Null entry\n", cmd);
- return;
- }
- strcpy(cmd, history[i]);
- } else if (*cmd == 'h' && cmd[1] == '\0') {
- for (i=0; i<HISTORY_SIZE; i++) {
- if (history[i] != NULL)
- printf("%2d: %s\n", i+1, history[i]);
- }
- return;
- } else if (*cmd != '\0') {
- if (history[HISTORY_SIZE-1] != NULL)
- free(history[HISTORY_SIZE-1]);
- for (i=HISTORY_SIZE-1; i>0; i--)
- history[i] = history[i-1];
- history[0] = strdup(cmd);
- }
- }
- #endif
- if (c = strchr(cmd, '&')) {
- *c = '\0';
- bg = 1;
- } else
- bg = 0;
- /* Set the last exit code */
- setenv("?", last_exit_code, 1);
-
- if ((cmd = expandenvvar(cmd)) == NULL)
- return;
- if ((*cmd == '\0') || !makeargs(cmd, &argc, &argv))
- return;
- /*
- * Search for the command in the alias table.
- * If it is found, then replace the command name with
- * the alias, and append any other arguments to it.
- */
- alias = findalias(argv[0]);
- if (alias) {
- cmd = buf;
- strcpy(cmd, alias->value);
- while (--argc > 0) {
- strcat(cmd, " ");
- strcat(cmd, *++argv);
- }
- if (!makeargs(cmd, &argc, &argv))
- return;
- }
- /*
- * BASH-style variable setting
- */
- if (argc == 1) {
- c = index(argv[0], '=');
- if (c > argv[0]) {
- *c++ = '\0';
- setenv(argv[0], c, 1);
- return;
- }
- }
-
- /*
- * Now look for the command in the builtin table, and execute
- * the command if found.
- */
- #ifdef FAVOUR_EXTERNAL_COMMANDS
- if (!command_in_path(argv[0]))
- #endif
- if (trybuiltin(argc, argv))
- return;
- /*
- * Not found, run the program along the PATH list.
- */
- runcmd(cmd, bg, argc, argv);
- }
- #ifdef FAVOUR_EXTERNAL_COMMANDS
- /*
- * return true if we find this command in our
- * path.
- */
- static BOOL
- command_in_path(char *cmd)
- {
- struct stat stat_buf;
- if (strchr(cmd, '/') == 0) {
- char * path;
- static char path_copy[PATHLEN];
-
- /* Search path for binary */
- for (path = getenv("PATH"); path && *path; ) {
- char * p2;
- strcpy(path_copy, path);
- if (p2 = strchr(path_copy, ':')) {
- *p2 = '\0';
- }
-
- if (strlen(path_copy))
- strcat(path_copy, "/");
- strcat(path_copy, cmd);
-
- if (!stat(path_copy, &stat_buf) && (stat_buf.st_mode & 0111))
- return(TRUE);
-
- p2 = strchr(path, ':');
- if (p2)
- path = p2 + 1;
- else
- path = 0;
- }
- } else if (!stat(cmd, &stat_buf) && (stat_buf.st_mode & 0111))
- return(TRUE);
- return(FALSE);
- }
- #endif /* FAVOUR_EXTERNAL_COMMANDS */
- /*
- * Try to execute a built-in command.
- * Returns TRUE if the command is a built in, whether or not the
- * command succeeds. Returns FALSE if this is not a built-in command.
- */
- static BOOL
- trybuiltin(argc, argv)
- char **argv;
- {
- CMDTAB *cmdptr;
- int oac;
- int newargc;
- int matches;
- int i;
- char *newargv[MAXARGS];
- char *nametable[MAXARGS];
- cmdptr = cmdtab - 1;
- do {
- cmdptr++;
- if (cmdptr->name[0] == 0)
- return FALSE;
- } while (strcmp(argv[0], cmdptr->name));
-
- /*
- * Give a usage string if the number of arguments is too large
- * or too small.
- */
- if ((argc < cmdptr->minargs) || (argc > cmdptr->maxargs)) {
- fprintf(stderr, "usage: %s %s\n",
- cmdptr->name, cmdptr->usage);
- fflush(stderr);
- return TRUE;
- }
- /*
- * Check here for several special commands which do not
- * have wildcarding done for them.
- */
- /* if (cmdptr->func == do_prompt) {
- (*cmdptr->func)(argc, argv);
- return TRUE;
- }
- */
- /*
- * Now for each command argument, see if it is a wildcard, and if
- * so, replace the argument with the list of matching filenames.
- */
- newargv[0] = argv[0];
- newargc = 1;
- oac = 0;
- while (++oac < argc) {
- if (argv[oac][0] == '"' || argv[oac][0] == '\'') {
- argv[oac]++;
- matches = 0;
- }
- else {
- matches = expandwildcards(argv[oac], MAXARGS, nametable);
- if (matches < 0)
- return TRUE;
- }
- if ((newargc + matches) >= MAXARGS) {
- fprintf(stderr, "Too many arguments\n");
- return TRUE;
- }
- if (matches == 0)
- newargv[newargc++] = argv[oac];
- for (i = 0; i < matches; i++)
- newargv[newargc++] = nametable[i];
- }
- (*cmdptr->func)(newargc, newargv);
- return TRUE;
- }
- /*
- * Execute the specified command.
- */
- static void
- runcmd(cmd, bg, argc, argv)
- char *cmd;
- int bg;
- int argc;
- char **argv;
- {
- register char * cp;
- BOOL magic;
- int pid;
- int status;
- int oac;
- int newargc;
- int matches;
- int i;
- char *newargv[MAXARGS];
- char *nametable[MAXARGS];
- struct sigaction act;
-
- newargv[0] = argv[0];
-
- #ifdef INTERNAL_PATH_EXPANSION
- if (strchr(argv[0], '/') == 0) {
- char * path;
- struct stat stat_buf;
- static char path_copy[PATHLEN];
-
- /* Search path for binary */
- for (path = getenv("PATH"); path && *path; ) {
- char * p2;
- strncpy(path_copy, path, sizeof(path_copy - 1));
- if (p2 = strchr(path_copy, ':')) {
- *p2 = '\0';
- }
-
- if (strlen(path_copy))
- strncat(path_copy, "/", sizeof(path_copy));
- strncat(path_copy, argv[0], sizeof(path_copy));
-
- if (!stat(path_copy, &stat_buf) && (stat_buf.st_mode & 0111)) {
- newargv[0] = path_copy;
- break;
- }
-
- p2 = strchr(path, ':');
- if (p2)
- path = p2 + 1;
- else
- path = 0;
- }
- }
- #endif
- /*
- * Now for each command argument, see if it is a wildcard, and if
- * so, replace the argument with the list of matching filenames.
- */
- newargc = 1;
- oac = 0;
- while (++oac < argc) {
- if (argv[oac][0] == '"' || argv[oac][0] == '\'') {
- argv[oac]++;
- matches = 0;
- }
- else {
- matches = expandwildcards(argv[oac], MAXARGS, nametable);
- if (matches < 0)
- return;
- }
- if ((newargc + matches) >= MAXARGS) {
- fprintf(stderr, "Too many arguments\n");
- return;
- }
- if (matches == 0)
- newargv[newargc++] = argv[oac];
- for (i = 0; i < matches; i++)
- newargv[newargc++] = nametable[i];
- }
-
- newargv[newargc] = 0;
- magic = FALSE;
-
- /*
- for (cp = cmd; *cp; cp++) {
- if ((*cp >= 'a') && (*cp <= 'z'))
- continue;
- if ((*cp >= 'A') && (*cp <= 'Z'))
- continue;
- if (isdecimal(*cp))
- continue;
- if (isblank(*cp))
- continue;
- if ((*cp == '.') || (*cp == '/') || (*cp == '-') ||
- (*cp == '+') || (*cp == '=') || (*cp == '_') ||
- (*cp == ':') || (*cp == ','))
- continue;
- magic = TRUE;
- }
- */
- if (magic) {
- printf("%s: no such file or directory\n", cmd);
- system(cmd);
- return;
- }
-
- if (!bg)
- signal(SIGCHLD, SIG_DFL);
- /*
- * No magic characters in the expanded command, so do the fork and
- * exec ourself. If this fails with ENOEXEC, then run the
- * shell anyway since it might be a shell script.
- */
- if (!(pid = vfork())) {
- int ci;
- /*
- * We are the child, so run the program.
- * First close any extra file descriptors we have opened.
- * be sure not to modify any globals after the vfork !
- */
-
- for (ci = 0; ci < sourcecount; ci++)
- if (sourcefiles[ci] != stdin)
- close(fileno(sourcefiles[ci]));
-
- signal(SIGINT, SIG_DFL);
- signal(SIGQUIT, SIG_DFL);
- signal(SIGCHLD, SIG_DFL);
-
- execvp(newargv[0], newargv);
- printf("%s: %s\n", newargv[0], (errno == ENOENT) ? "Bad command or file name" : strerror(errno));
-
- _exit(0);
- }
-
- if (pid < 0) {
- memset(&act, 0, sizeof(act));
- act.sa_handler = catchchild;
- act.sa_flags = SA_RESTART;
- sigaction(SIGCHLD, &act, NULL);
- perror("vfork failed");
- return;
- }
-
- if (bg) {
- printf("[%d]\n", pid);
- return;
- }
- if (pid) {
- int cpid;
- status = 0;
- intcrlf = FALSE;
- for (;;) {
- cpid = wait4(pid, &status, 0, 0);
- if ((cpid < 0) && (errno == EINTR))
- continue;
- if (cpid < 0)
- break;
- if (cpid != pid) {
- fprintf(stderr, "sh %d: child %d died\n", getpid(), cpid);
- continue;
- }
- }
- act.sa_handler = catchchild;
- memset(&act.sa_mask, 0, sizeof(act.sa_mask));
- act.sa_flags = SA_RESTART;
- sigaction(SIGCHLD, &act, NULL);
-
- intcrlf = TRUE;
- if (WIFEXITED(status)) {
- if (WEXITSTATUS(status) == 0)
- return;
- exit_code = WEXITSTATUS(status);
- } else
- exit_code = 1;
- return;
- }
-
- perror(argv[0]);
- exit(1);
- }
- #ifdef CMD_HELP
- void
- do_help(argc, argv)
- char **argv;
- {
- CMDTAB *cmdptr;
- for (cmdptr = cmdtab; cmdptr->name && cmdptr->name[0]; cmdptr++)
- printf("%-10s %s\n", cmdptr->name, cmdptr->usage);
- }
- #endif /* CMD_HELP */
- #ifdef CMD_ALIAS
- void
- do_alias(argc, argv)
- char **argv;
- {
- char *name;
- char *value;
- ALIAS *alias;
- int count;
- char buf[CMDLEN];
- if (argc < 2) {
- count = aliascount;
- for (alias = aliastable; count-- > 0; alias++)
- printf("%s\t%s\n", alias->name, alias->value);
- return;
- }
- name = argv[1];
- if (argc == 2) {
- alias = findalias(name);
- if (alias)
- printf("%s\n", alias->value);
- else
- fprintf(stderr, "Alias \"%s\" is not defined\n", name);
- return;
- }
- if (strcmp(name, "alias") == 0) {
- fprintf(stderr, "Cannot alias \"alias\"\n");
- return;
- }
- if (!makestring(argc - 2, argv + 2, buf, CMDLEN))
- return;
- value = malloc(strlen(buf) + 1);
- if (value == NULL) {
- fprintf(stderr, "No memory for alias value\n");
- return;
- }
- strcpy(value, buf);
- alias = findalias(name);
- if (alias) {
- free(alias->value);
- alias->value = value;
- return;
- }
- if ((aliascount % ALIASALLOC) == 0) {
- count = aliascount + ALIASALLOC;
- if (aliastable)
- alias = (ALIAS *) realloc(aliastable,
- sizeof(ALIAS *) * count);
- else
- alias = (ALIAS *) malloc(sizeof(ALIAS *) * count);
- if (alias == NULL) {
- free(value);
- fprintf(stderr, "No memory for alias table\n");
- return;
- }
- aliastable = alias;
- }
- alias = &aliastable[aliascount];
- alias->name = malloc(strlen(name) + 1);
- if (alias->name == NULL) {
- free(value);
- fprintf(stderr, "No memory for alias name\n");
- return;
- }
- strcpy(alias->name, name);
- alias->value = value;
- aliascount++;
- }
- #endif /* CMD_ALIAS */
- /*
- * Look up an alias name, and return a pointer to it.
- * Returns NULL if the name does not exist.
- */
- static ALIAS *
- findalias(name)
- char *name;
- {
- ALIAS *alias;
- int count;
- count = aliascount;
- for (alias = aliastable; count-- > 0; alias++) {
- if (strcmp(name, alias->name) == 0)
- return alias;
- }
- return NULL;
- }
- void
- do_source(argc, argv)
- char **argv;
- {
- readfile(argv[1]);
- }
- /*void
- do_cd(argc, argv)
- char **argv;
- {
- char *name;
- name = argv[1];
-
- if (chdir(name))
- perror("Unable to chdir to %s");
-
- }*/
- void
- do_pid(argc, argv)
- {
- printf("%d\n", getpid());
- }
- void
- do_exec(argc, argv)
- char **argv;
- {
- while (--sourcecount >= 0) {
- if (sourcefiles[sourcecount] != stdin)
- fclose(sourcefiles[sourcecount]);
- }
- argv[argc] = NULL;
- execvp(argv[1], &argv[1]);
- perror(argv[1]);
- exit(1);
- }
- /*void
- do_exit(argc, argv)
- char **argv;
- {
- if (argc>1)
- exit(atoi(argv[1]));
- else
- exit(0);
- }*/
- #ifdef CMD_ALIAS
- void
- do_unalias(argc, argv)
- char **argv;
- {
- ALIAS *alias;
- while (--argc > 0) {
- alias = findalias(*++argv);
- if (alias == NULL)
- continue;
- free(alias->name);
- free(alias->value);
- aliascount--;
- alias->name = aliastable[aliascount].name;
- alias->value = aliastable[aliascount].value;
- }
- }
- #endif /* CMD_ALIAS */
- /*
- * Display the prompt string.
- */
- static void
- showprompt()
- {
- char *cp;
- //;'pa990523 changed from 6...
- char buf[60];
-
- if ((cp = getenv("PS1")) != NULL) {
- printf("%s", cp);
- }
- else {
- *buf = '\0';
- getcwd(buf, sizeof(buf) - 1);
- printf("%s> ", buf);
- }
- fflush(stdout);
- }
- static void
- catchint()
- {
- signal(SIGINT, catchint);
- intflag = TRUE;
- if (intcrlf)
- write(STDOUT, "\n", 1);
- }
- static void
- catchquit()
- {
- signal(SIGQUIT, catchquit);
- intflag = TRUE;
- if (intcrlf)
- write(STDOUT, "\n", 1);
- }
- static void
- catchchild()
- {
- char buf[40];
- pid_t pid;
- int status;
-
- /*signal(SIGCHLD, catchchild);*/ /* Unneeded */
- pid = wait4(-1, &status, WUNTRACED, 0);
- if (WIFSTOPPED(status))
- sprintf(buf, "sh %d: Child %d stopped\n", getpid(), pid);
- else
- sprintf(buf, "sh %d: Child %d died\n", getpid(), pid);
-
- if (intcrlf)
- write(STDOUT, "\n", 1);
-
- write(STDOUT, buf, strlen(buf));
- }
- /* END CODE */
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