-/* minix xargs - Make and execute commands
- * Author: Ian Nicholls: 1 Mar 90 */
-
+/* vi: set sw=4 ts=4: */
/*
- * xargs - Accept words from stdin until, combined with the arguments
- * given on the command line, just fit into the command line limit.
- * Then, execute the result.
- * e.g. ls | xargs compress
- * find . -name '*.s' -print | xargs ar qv libc.a
+ * Mini xargs implementation for busybox
+ *
+ * Copyright (C) 2000 by Lineo, inc.
+ * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
*
- * flags: -t Print the command just before it is run
- * -l len Use len as maximum line length (default 490, max 1023)
- * -e ending Append ending to the command before executing it.
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
*
- * Exits with: 0 No errors.
- * 1 If any system(3) call returns a nonzero status.
- * 2 Usage error
- * 3 Line length too short to contain some single argument.
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
*
- * Examples: xargs ar qv libc.a < liborder # Create a new libc.a
- * find . -name '*.s' -print | xargs rm # Remove all .s files
- * find . -type f ! -name '*.Z' \ # Compress old files.
- * -atime +60 -print | xargs compress -v
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
- * Bugs: If the command contains unquoted wildflags, then the system(3) call
- * call may expand this to larger than the maximum line size.
- * The command is not executed if nothing was read from stdin.
- * xargs may give up too easily when the command returns nonzero.
*/
-#define USAGE "usage: xargs [-t] [-l len] [-e endargs] command [args...]\n"
-#include <errno.h>
+#include "internal.h"
#include <stdlib.h>
-#include <string.h>
#include <stdio.h>
+#include <string.h>
+#include <errno.h>
#include <getopt.h>
-#ifndef MAX_ARGLINE
-# define MAX_ARGLINE 1023
-#endif
-#ifndef min
-# define min(a,b) ((a) < (b) ? (a) : (b))
-#endif
-
-char outlin[MAX_ARGLINE];
-char inlin[MAX_ARGLINE];
-char startlin[MAX_ARGLINE];
-char *ending = NULL;
-char traceflag = 0;
-int xargs_main(int ac, char **av)
+int xargs_main(int argc, char **argv)
{
- int outlen, inlen, startlen, endlen=0, i;
- char errflg = 0;
- int maxlin = MAX_ARGLINE;
+ char *in_from_stdin = NULL;
+ char *args_from_cmdline = NULL;
+ char *cmd_to_be_executed = NULL;
+ char traceflag = 0;
+ int len_args_from_cmdline, len_cmd_to_be_executed, len, opt;
- while ((i = getopt(ac, av, "tl:e:")) != EOF)
- switch (i) {
- case 't': traceflag = 1; break;
- case 'l': maxlin = min(MAX_ARGLINE, atoi(optarg)); break;
- case 'e': ending = optarg; break;
- case '?': errflg++; break;
- }
- if (errflg) {
- fprintf(stderr, USAGE);
- exit(2);
- }
+ while ((opt = getopt(argc, argv, "t")) != EOF) {
+ switch (opt) {
+ case 't':
+ traceflag=1;
+ break;
+ default:
+ fatalError(xargs_usage);
+ }
+ }
- startlin[0] = 0;
- if (optind == ac) {
- strcat(startlin, "echo ");
- }
- else for ( ; optind < ac; optind++) {
- strcat(startlin, av[optind]);
- strcat(startlin, " ");
- }
- startlen = strlen(startlin);
- if (ending) endlen = strlen(ending);
- maxlin = maxlin - 1 - endlen; /* Pre-compute */
+ /* Store the command and arguments to be executed (from the command line) */
+ if (optind == argc) {
+ len_args_from_cmdline = 6;
+ args_from_cmdline = xmalloc(len_args_from_cmdline);
+ strcat(args_from_cmdline, "echo ");
+ } else {
+ opt=strlen(argv[optind]);
+ len_args_from_cmdline = (opt > 10)? opt : 10;
+ args_from_cmdline = xcalloc(len_args_from_cmdline, sizeof(char));
+ for (; optind < argc; optind++) {
+ if (strlen(argv[optind]) + strlen(args_from_cmdline) >
+ len_args_from_cmdline) {
+ len_args_from_cmdline += strlen(argv[optind]);
+ args_from_cmdline =
+ xrealloc(args_from_cmdline,
+ len_args_from_cmdline+1);
+ }
+ strcat(args_from_cmdline, argv[optind]);
+ strcat(args_from_cmdline, " ");
+ }
+ }
- strcpy(outlin, startlin);
- outlen = startlen;
+ /* Set up some space for the command to be executed to be held in */
+ len_cmd_to_be_executed=10;
+ cmd_to_be_executed = xcalloc(len_cmd_to_be_executed, sizeof(char));
+ strcpy(cmd_to_be_executed, args_from_cmdline);
+ strcat(cmd_to_be_executed, " ");
- while (gets(inlin) != NULL) {
- inlen = strlen(inlin);
- if (maxlin <= (outlen + inlen)) {
- if (outlen == startlen) {
- fprintf(stderr, "%s: Line length too short to process '%s'\n",
- av[0], inlin);
- exit(3);
- }
- if (ending) strcat(outlin, ending);
- if (traceflag) fputs(outlin,stderr);
- errno = 0;
- if (0 != system(outlin)) {
- if (errno != 0) perror("xargs");
- exit(1);
- }
- strcpy(outlin, startlin);
- outlen = startlen;
- }
- strcat(outlin, inlin);
- strcat(outlin, " ");
- outlen = outlen + inlen + 1;
- }
- if (outlen != startlen) {
- if (ending) strcat(outlin, ending);
- if (traceflag) fputs(outlin,stderr);
- errno = 0;
- if (0 != system(outlin)) {
- if (errno != 0) perror("xargs");
- exit(1);
- }
- }
- return 0;
+ /* Now, read in one line at a time from stdin, and run command+args on it */
+ in_from_stdin = get_line_from_file(stdin);
+ for (;in_from_stdin!=NULL;) {
+ len = strlen(in_from_stdin) + len_args_from_cmdline;
+ if ( len > len_cmd_to_be_executed ) {
+ len_cmd_to_be_executed=len+3;
+ cmd_to_be_executed=xrealloc(cmd_to_be_executed, len_cmd_to_be_executed);
+ }
+ strcat(cmd_to_be_executed, in_from_stdin);
+ strcat(cmd_to_be_executed+strlen(cmd_to_be_executed)-2, " ");
+ strcat(cmd_to_be_executed, " ");
+
+ free(in_from_stdin);
+ in_from_stdin = get_line_from_file(stdin);
+ }
+
+ if (traceflag==1)
+ fputs(cmd_to_be_executed, stderr);
+
+ if ((system(cmd_to_be_executed) != 0) && (errno != 0))
+ fatalError("%s", strerror(errno));
+
+
+#ifdef BB_FEATURE_CLEAN_UP
+ free(args_from_cmdline);
+ free(cmd_to_be_executed);
+#endif
+
+ return 0;
}
+/*
+Local Variables:
+c-file-style: "linux"
+c-basic-offset: 4
+tab-width: 4
+End:
+*/
+
-/* minix xargs - Make and execute commands
- * Author: Ian Nicholls: 1 Mar 90 */
-
+/* vi: set sw=4 ts=4: */
/*
- * xargs - Accept words from stdin until, combined with the arguments
- * given on the command line, just fit into the command line limit.
- * Then, execute the result.
- * e.g. ls | xargs compress
- * find . -name '*.s' -print | xargs ar qv libc.a
+ * Mini xargs implementation for busybox
+ *
+ * Copyright (C) 2000 by Lineo, inc.
+ * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
*
- * flags: -t Print the command just before it is run
- * -l len Use len as maximum line length (default 490, max 1023)
- * -e ending Append ending to the command before executing it.
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
*
- * Exits with: 0 No errors.
- * 1 If any system(3) call returns a nonzero status.
- * 2 Usage error
- * 3 Line length too short to contain some single argument.
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
*
- * Examples: xargs ar qv libc.a < liborder # Create a new libc.a
- * find . -name '*.s' -print | xargs rm # Remove all .s files
- * find . -type f ! -name '*.Z' \ # Compress old files.
- * -atime +60 -print | xargs compress -v
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
- * Bugs: If the command contains unquoted wildflags, then the system(3) call
- * call may expand this to larger than the maximum line size.
- * The command is not executed if nothing was read from stdin.
- * xargs may give up too easily when the command returns nonzero.
*/
-#define USAGE "usage: xargs [-t] [-l len] [-e endargs] command [args...]\n"
-#include <errno.h>
+#include "internal.h"
#include <stdlib.h>
-#include <string.h>
#include <stdio.h>
+#include <string.h>
+#include <errno.h>
#include <getopt.h>
-#ifndef MAX_ARGLINE
-# define MAX_ARGLINE 1023
-#endif
-#ifndef min
-# define min(a,b) ((a) < (b) ? (a) : (b))
-#endif
-
-char outlin[MAX_ARGLINE];
-char inlin[MAX_ARGLINE];
-char startlin[MAX_ARGLINE];
-char *ending = NULL;
-char traceflag = 0;
-int xargs_main(int ac, char **av)
+int xargs_main(int argc, char **argv)
{
- int outlen, inlen, startlen, endlen=0, i;
- char errflg = 0;
- int maxlin = MAX_ARGLINE;
+ char *in_from_stdin = NULL;
+ char *args_from_cmdline = NULL;
+ char *cmd_to_be_executed = NULL;
+ char traceflag = 0;
+ int len_args_from_cmdline, len_cmd_to_be_executed, len, opt;
- while ((i = getopt(ac, av, "tl:e:")) != EOF)
- switch (i) {
- case 't': traceflag = 1; break;
- case 'l': maxlin = min(MAX_ARGLINE, atoi(optarg)); break;
- case 'e': ending = optarg; break;
- case '?': errflg++; break;
- }
- if (errflg) {
- fprintf(stderr, USAGE);
- exit(2);
- }
+ while ((opt = getopt(argc, argv, "t")) != EOF) {
+ switch (opt) {
+ case 't':
+ traceflag=1;
+ break;
+ default:
+ fatalError(xargs_usage);
+ }
+ }
- startlin[0] = 0;
- if (optind == ac) {
- strcat(startlin, "echo ");
- }
- else for ( ; optind < ac; optind++) {
- strcat(startlin, av[optind]);
- strcat(startlin, " ");
- }
- startlen = strlen(startlin);
- if (ending) endlen = strlen(ending);
- maxlin = maxlin - 1 - endlen; /* Pre-compute */
+ /* Store the command and arguments to be executed (from the command line) */
+ if (optind == argc) {
+ len_args_from_cmdline = 6;
+ args_from_cmdline = xmalloc(len_args_from_cmdline);
+ strcat(args_from_cmdline, "echo ");
+ } else {
+ opt=strlen(argv[optind]);
+ len_args_from_cmdline = (opt > 10)? opt : 10;
+ args_from_cmdline = xcalloc(len_args_from_cmdline, sizeof(char));
+ for (; optind < argc; optind++) {
+ if (strlen(argv[optind]) + strlen(args_from_cmdline) >
+ len_args_from_cmdline) {
+ len_args_from_cmdline += strlen(argv[optind]);
+ args_from_cmdline =
+ xrealloc(args_from_cmdline,
+ len_args_from_cmdline+1);
+ }
+ strcat(args_from_cmdline, argv[optind]);
+ strcat(args_from_cmdline, " ");
+ }
+ }
- strcpy(outlin, startlin);
- outlen = startlen;
+ /* Set up some space for the command to be executed to be held in */
+ len_cmd_to_be_executed=10;
+ cmd_to_be_executed = xcalloc(len_cmd_to_be_executed, sizeof(char));
+ strcpy(cmd_to_be_executed, args_from_cmdline);
+ strcat(cmd_to_be_executed, " ");
- while (gets(inlin) != NULL) {
- inlen = strlen(inlin);
- if (maxlin <= (outlen + inlen)) {
- if (outlen == startlen) {
- fprintf(stderr, "%s: Line length too short to process '%s'\n",
- av[0], inlin);
- exit(3);
- }
- if (ending) strcat(outlin, ending);
- if (traceflag) fputs(outlin,stderr);
- errno = 0;
- if (0 != system(outlin)) {
- if (errno != 0) perror("xargs");
- exit(1);
- }
- strcpy(outlin, startlin);
- outlen = startlen;
- }
- strcat(outlin, inlin);
- strcat(outlin, " ");
- outlen = outlen + inlen + 1;
- }
- if (outlen != startlen) {
- if (ending) strcat(outlin, ending);
- if (traceflag) fputs(outlin,stderr);
- errno = 0;
- if (0 != system(outlin)) {
- if (errno != 0) perror("xargs");
- exit(1);
- }
- }
- return 0;
+ /* Now, read in one line at a time from stdin, and run command+args on it */
+ in_from_stdin = get_line_from_file(stdin);
+ for (;in_from_stdin!=NULL;) {
+ len = strlen(in_from_stdin) + len_args_from_cmdline;
+ if ( len > len_cmd_to_be_executed ) {
+ len_cmd_to_be_executed=len+3;
+ cmd_to_be_executed=xrealloc(cmd_to_be_executed, len_cmd_to_be_executed);
+ }
+ strcat(cmd_to_be_executed, in_from_stdin);
+ strcat(cmd_to_be_executed+strlen(cmd_to_be_executed)-2, " ");
+ strcat(cmd_to_be_executed, " ");
+
+ free(in_from_stdin);
+ in_from_stdin = get_line_from_file(stdin);
+ }
+
+ if (traceflag==1)
+ fputs(cmd_to_be_executed, stderr);
+
+ if ((system(cmd_to_be_executed) != 0) && (errno != 0))
+ fatalError("%s", strerror(errno));
+
+
+#ifdef BB_FEATURE_CLEAN_UP
+ free(args_from_cmdline);
+ free(cmd_to_be_executed);
+#endif
+
+ return 0;
}
+/*
+Local Variables:
+c-file-style: "linux"
+c-basic-offset: 4
+tab-width: 4
+End:
+*/
+
projects / oweals / busybox.git / commitdiff