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-rw-r--r--busybox.h1
-rw-r--r--coreutils/head.c93
-rw-r--r--head.c93
-rw-r--r--include/busybox.h1
-rw-r--r--utility.c20
5 files changed, 105 insertions, 103 deletions
diff --git a/busybox.h b/busybox.h
index faad206ee..da17b8ab3 100644
--- a/busybox.h
+++ b/busybox.h
@@ -395,6 +395,7 @@ extern int print_file_by_name(char *filename);
extern char process_escape_sequence(char **ptr);
extern char *get_last_path_component(char *path);
extern void xregcomp(regex_t *preg, const char *regex, int cflags);
+extern FILE *wfopen(const char *path, const char *mode);
extern FILE *xfopen(const char *path, const char *mode);
#ifndef DMALLOC
diff --git a/coreutils/head.c b/coreutils/head.c
index c232e1153..92b43bae2 100644
--- a/coreutils/head.c
+++ b/coreutils/head.c
@@ -26,17 +26,16 @@
#include <errno.h>
#include <stdio.h>
-int head(int len, FILE * src)
+int head(int len, FILE *fp)
{
int i;
- char buffer[1024];
+ char *input;
for (i = 0; i < len; i++) {
- fgets(buffer, 1024, src);
- if (feof(src)) {
+ if ((input = get_line_from_file(fp)) == NULL)
break;
- }
- fputs(buffer, stdout);
+ fputs(input, stdout);
+ free(input);
}
return 0;
}
@@ -44,60 +43,54 @@ int head(int len, FILE * src)
/* BusyBoxed head(1) */
int head_main(int argc, char **argv)
{
- char opt;
- int len = 10, tmplen, i;
+ FILE *fp;
+ int need_headers, opt, len = 10, status = EXIT_SUCCESS;
/* parse argv[] */
- for (i = 1; i < argc; i++) {
- if (argv[i][0] == '-') {
- opt = argv[i][1];
- switch (opt) {
- case 'n':
- tmplen = 0;
- if (++i < argc)
- tmplen = atoi(argv[i]);
- if (tmplen < 1)
- usage(head_usage);
- len = tmplen;
+ while ((opt = getopt(argc, argv, "n:")) > 0) {
+ switch (opt) {
+ case 'n':
+ len = atoi(optarg);
+ if (len >= 1)
break;
- case '-':
- case 'h':
- usage(head_usage);
- default:
- errorMsg("invalid option -- %c\n", opt);
- usage(head_usage);
- }
- } else {
- break;
+ /* fallthrough */
+ default:
+ usage(head_usage);
}
}
/* get rest of argv[] or stdin if nothing's left */
- if (i >= argc) {
+ if (argv[optind] == NULL) {
head(len, stdin);
+ return status;
+ }
- } else {
- int need_headers = ((argc - i) > 1);
-
- for (; i < argc; i++) {
- FILE *src;
-
- src = fopen(argv[i], "r");
- if (!src) {
- errorMsg("%s: %s\n", argv[i], strerror(errno));
- } else {
- /* emulating GNU behaviour */
- if (need_headers) {
- fprintf(stdout, "==> %s <==\n", argv[i]);
- }
- head(len, src);
- if (i < argc - 1) {
- fprintf(stdout, "\n");
- }
+ need_headers = optind != (argc - 1);
+ while (argv[optind]) {
+ if (strcmp(argv[optind], "-") == 0) {
+ fp = stdin;
+ argv[optind] = "standard input";
+ } else {
+ if ((fp = wfopen(argv[optind], "r")) == NULL)
+ status = EXIT_FAILURE;
+ }
+ if (fp) {
+ if (need_headers) {
+ fprintf(stdout, "==> %s <==\n", argv[optind]);
+ }
+ head(len, fp);
+ if (errno) {
+ errorMsg("%s: %s\n", argv[optind], strerror(errno));
+ status = EXIT_FAILURE;
+ errno = 0;
}
+ if (optind < argc - 1)
+ fprintf(stdout, "\n");
+ if (fp != stdin)
+ fclose(fp);
}
+ optind++;
}
- return(0);
-}
-/* $Id: head.c,v 1.14 2000/09/25 21:45:57 andersen Exp $ */
+ return status;
+}
diff --git a/head.c b/head.c
index c232e1153..92b43bae2 100644
--- a/head.c
+++ b/head.c
@@ -26,17 +26,16 @@
#include <errno.h>
#include <stdio.h>
-int head(int len, FILE * src)
+int head(int len, FILE *fp)
{
int i;
- char buffer[1024];
+ char *input;
for (i = 0; i < len; i++) {
- fgets(buffer, 1024, src);
- if (feof(src)) {
+ if ((input = get_line_from_file(fp)) == NULL)
break;
- }
- fputs(buffer, stdout);
+ fputs(input, stdout);
+ free(input);
}
return 0;
}
@@ -44,60 +43,54 @@ int head(int len, FILE * src)
/* BusyBoxed head(1) */
int head_main(int argc, char **argv)
{
- char opt;
- int len = 10, tmplen, i;
+ FILE *fp;
+ int need_headers, opt, len = 10, status = EXIT_SUCCESS;
/* parse argv[] */
- for (i = 1; i < argc; i++) {
- if (argv[i][0] == '-') {
- opt = argv[i][1];
- switch (opt) {
- case 'n':
- tmplen = 0;
- if (++i < argc)
- tmplen = atoi(argv[i]);
- if (tmplen < 1)
- usage(head_usage);
- len = tmplen;
+ while ((opt = getopt(argc, argv, "n:")) > 0) {
+ switch (opt) {
+ case 'n':
+ len = atoi(optarg);
+ if (len >= 1)
break;
- case '-':
- case 'h':
- usage(head_usage);
- default:
- errorMsg("invalid option -- %c\n", opt);
- usage(head_usage);
- }
- } else {
- break;
+ /* fallthrough */
+ default:
+ usage(head_usage);
}
}
/* get rest of argv[] or stdin if nothing's left */
- if (i >= argc) {
+ if (argv[optind] == NULL) {
head(len, stdin);
+ return status;
+ }
- } else {
- int need_headers = ((argc - i) > 1);
-
- for (; i < argc; i++) {
- FILE *src;
-
- src = fopen(argv[i], "r");
- if (!src) {
- errorMsg("%s: %s\n", argv[i], strerror(errno));
- } else {
- /* emulating GNU behaviour */
- if (need_headers) {
- fprintf(stdout, "==> %s <==\n", argv[i]);
- }
- head(len, src);
- if (i < argc - 1) {
- fprintf(stdout, "\n");
- }
+ need_headers = optind != (argc - 1);
+ while (argv[optind]) {
+ if (strcmp(argv[optind], "-") == 0) {
+ fp = stdin;
+ argv[optind] = "standard input";
+ } else {
+ if ((fp = wfopen(argv[optind], "r")) == NULL)
+ status = EXIT_FAILURE;
+ }
+ if (fp) {
+ if (need_headers) {
+ fprintf(stdout, "==> %s <==\n", argv[optind]);
+ }
+ head(len, fp);
+ if (errno) {
+ errorMsg("%s: %s\n", argv[optind], strerror(errno));
+ status = EXIT_FAILURE;
+ errno = 0;
}
+ if (optind < argc - 1)
+ fprintf(stdout, "\n");
+ if (fp != stdin)
+ fclose(fp);
}
+ optind++;
}
- return(0);
-}
-/* $Id: head.c,v 1.14 2000/09/25 21:45:57 andersen Exp $ */
+ return status;
+}
diff --git a/include/busybox.h b/include/busybox.h
index faad206ee..da17b8ab3 100644
--- a/include/busybox.h
+++ b/include/busybox.h
@@ -395,6 +395,7 @@ extern int print_file_by_name(char *filename);
extern char process_escape_sequence(char **ptr);
extern char *get_last_path_component(char *path);
extern void xregcomp(regex_t *preg, const char *regex, int cflags);
+extern FILE *wfopen(const char *path, const char *mode);
extern FILE *xfopen(const char *path, const char *mode);
#ifndef DMALLOC
diff --git a/utility.c b/utility.c
index df2515c2b..03d649757 100644
--- a/utility.c
+++ b/utility.c
@@ -1634,12 +1634,14 @@ extern void print_file(FILE *file)
extern int print_file_by_name(char *filename)
{
FILE *file;
- file = fopen(filename, "r");
- if (file == NULL) {
+ if ((file = wfopen(filename, "r")) == NULL)
+ return FALSE;
+ print_file(file);
+ if (errno) {
errorMsg("%s: %s\n", filename, strerror(errno));
+ errno = 0;
return FALSE;
}
- print_file(file);
return TRUE;
}
#endif /* BB_CAT */
@@ -1719,6 +1721,18 @@ void xregcomp(regex_t *preg, const char *regex, int cflags)
}
#endif
+#if defined BB_CAT || defined BB_HEAD
+FILE *wfopen(const char *path, const char *mode)
+{
+ FILE *fp;
+ if ((fp = fopen(path, mode)) == NULL) {
+ errorMsg("%s: %s\n", path, strerror(errno));
+ errno = 0;
+ }
+ return fp;
+}
+#endif
+
#if defined BB_HOSTNAME || defined BB_LOADACM || defined BB_MORE || defined BB_SED || defined BB_SH || defined BB_UNIQ || defined BB_WC
FILE *xfopen(const char *path, const char *mode)
{
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-03 13:03:35 +0000