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ifupdown: stop emitting annoying/misleading error messages.

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Patch by Gabriel Somlo <somlo at cmu.edu>
This commit is contained in:
Denis Vlasenko 2006-10-11 22:16:56 +00:00
parent 8de82bf84f
commit f6f43df60b
4 changed files with 75 additions and 89 deletions
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68
debianutils/which.c
View File

@ -3,6 +3,7 @@
* Which implementation for busybox
*
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
* Copyright (C) 2006 Gabriel Somlo <somlo at cmu.edu>
*
* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
*
@ -10,74 +11,33 @@
*/
#include "busybox.h"
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/stat.h>
static int is_executable_file(char *a, struct stat *b)
{
return (!access(a,X_OK) && !stat(a, b) && S_ISREG(b->st_mode));
}
int which_main(int argc, char **argv)
{
int status;
size_t i, count;
char *path_list, *p;
int status = EXIT_SUCCESS;
char *p;
if (argc <= 1 || argv[1][0] == '-') {
bb_show_usage();
}
argc--;
path_list = getenv("PATH");
if (path_list != NULL) {
count = 1;
p = path_list;
while ((p = strchr(p, ':')) != NULL) {
*p++ = 0;
count++;
}
} else {
path_list = "/bin\0/sbin\0/usr/bin\0/usr/sbin\0/usr/local/bin";
count = 5;
}
status = EXIT_SUCCESS;
while (argc-- > 0) {
struct stat stat_b;
char *buf;
while (--argc > 0) {
argv++;
buf = argv[0];
/* If filename is either absolute or contains slashes,
* stat it */
if (strchr(buf, '/')) {
if (is_executable_file(buf, &stat_b)) {
puts(buf);
goto next;
if (strchr(*argv, '/')) {
if (execable_file(*argv)) {
puts(*argv);
continue;
}
} else {
/* File doesn't contain slashes */
p = path_list;
for (i = 0; i < count; i++) {
/* Empty component in PATH is treated as . */
buf = concat_path_file(p[0] ? p : ".", argv[0]);
if (is_executable_file(buf, &stat_b)) {
puts(buf);
free(buf);
goto next;
}
free(buf);
p += strlen(p) + 1;
p = find_execable(*argv);
if (p) {
puts(p);
free(p);
continue;
}
}
status = EXIT_FAILURE;
next: /* nothing */;
}
bb_fflush_stdout_and_exit(status);
}

4
include/libbb.h
View File

@ -430,6 +430,10 @@ char *last_char_is(const char *s, int c);
char *fgets_str(FILE *file, const char *terminating_string);
int execable_file(const char *name);
char *find_execable(const char *filename);
int exists_execable(const char *filename);
extern USE_DESKTOP(long long) int uncompress(int fd_in, int fd_out);
extern int inflate(int in, int out);

2
libbb/Kbuild
View File

@ -28,7 +28,7 @@ lib-y:= \
getopt32.o default_error_retval.o wfopen_input.o speed_table.o \
perror_nomsg_and_die.o perror_nomsg.o skip_whitespace.o bb_askpass.o \
warn_ignoring_args.o concat_subpath_file.o vfork_daemon_rexec.o \
bb_do_delay.o uuencode.o info_msg.o vinfo_msg.o
bb_do_delay.o uuencode.o info_msg.o vinfo_msg.o execable.o
# conditionally compiled objects:
lib-$(CONFIG_FEATURE_MOUNT_LOOP) += loop.o

90
networking/ifupdown.c
View File

@ -133,7 +133,7 @@ static int count_netmask_bits(char *dotted_quad)
}
#endif
static void addstr(char **buf, size_t *len, size_t *pos, char *str, size_t str_length)
static void addstr(char **buf, size_t *len, size_t *pos, const char *str, size_t str_length)
{
if (*pos + str_length >= *len) {
char *newbuf;
@ -150,7 +150,7 @@ static void addstr(char **buf, size_t *len, size_t *pos, char *str, size_t str_l
(*buf)[*pos] = '\0';
}
static int strncmpz(char *l, char *r, size_t llen)
static int strncmpz(const char *l, const char *r, size_t llen)
{
int i = strncmp(l, r, llen);
@ -161,7 +161,7 @@ static int strncmpz(char *l, char *r, size_t llen)
}
}
static char *get_var(char *id, size_t idlen, struct interface_defn_t *ifd)
static char *get_var(const char *id, size_t idlen, struct interface_defn_t *ifd)
{
int i;
@ -188,7 +188,7 @@ static char *get_var(char *id, size_t idlen, struct interface_defn_t *ifd)
return NULL;
}
static char *parse(char *command, struct interface_defn_t *ifd)
static char *parse(const char *command, struct interface_defn_t *ifd)
{
char *result = NULL;
@ -294,7 +294,7 @@ static char *parse(char *command, struct interface_defn_t *ifd)
}
/* execute() returns 1 for success and 0 for failure */
static int execute(char *command, struct interface_defn_t *ifd, execfn *exec)
static int execute(const char *command, struct interface_defn_t *ifd, execfn *exec)
{
char *out;
int ret;
@ -449,43 +449,65 @@ static int static_down(struct interface_defn_t *ifd, execfn *exec)
return ((result == 2) ? 2 : 0);
}
#ifndef CONFIG_APP_UDHCPC
struct dhcp_client_t
{
const char *name;
const char *startcmd;
const char *stopcmd;
};
static const struct dhcp_client_t ext_dhcp_clients[] = {
{ "udhcpc",
"udhcpc -R -n -p /var/run/udhcpc.%iface%.pid -i %iface% [[-H %hostname%]] [[-c %clientid%]] [[-s %script%]]",
"kill -TERM `cat /var/run/udhcpc.%iface%.pid` 2>/dev/null",
},
{ "pump",
"pump -i %iface% [[-h %hostname%]] [[-l %leasehours%]]",
"pump -i %iface% -k",
},
{ "dhclient",
"dhclient -pf /var/run/dhclient.%iface%.pid %iface%",
"kill -9 `cat /var/run/dhclient.%iface%.pid` 2>/dev/null",
},
{ "dhcpcd",
"dhcpcd [[-h %hostname%]] [[-i %vendor%]] [[-I %clientid%]] [[-l %leasetime%]] %iface%",
"dhcpcd -k %iface%",
},
};
#endif
static int dhcp_up(struct interface_defn_t *ifd, execfn *exec)
{
if (execute("udhcpc -R -n -p /var/run/udhcpc.%iface%.pid -i %iface% "
"[[-H %hostname%]] [[-c %clientid%]] [[-s %script%]]", ifd, exec))
return 1;
/* 2006-09-30: The following are deprecated, and should eventually be
* removed. For non-busybox (i.e., other than udhcpc) clients, use
* 'iface foo inet manual' in /etc/network/interfaces, and supply
* start/stop commands explicitly via up/down. */
if (execute("pump -i %iface% [[-h %hostname%]] [[-l %leasehours%]]",
ifd, exec)) return 1;
if (execute("dhclient -pf /var/run/dhclient.%iface%.pid %iface%",
ifd, exec)) return 1;
if (execute("dhcpcd [[-h %hostname%]] [[-i %vendor%]] [[-I %clientid%]] "
"[[-l %leasetime%]] %iface%", ifd, exec)) return 1;
#ifdef CONFIG_APP_UDHCPC
return execute("udhcpc -R -n -p /var/run/udhcpc.%iface%.pid "
"-i %iface% [[-H %hostname%]] [[-c %clientid%]] [[-s %script%]]",
ifd, exec);
#else
int i, nclients = sizeof(ext_dhcp_clients) / sizeof(ext_dhcp_clients[0]);
for (i = 0; i < nclients; i++) {
if (exists_execable(ext_dhcp_clients[i].name))
return execute(ext_dhcp_clients[i].startcmd, ifd, exec);
}
bb_error_msg("no dhcp clients found");
return 0;
#endif
}
static int dhcp_down(struct interface_defn_t *ifd, execfn *exec)
{
if (execute("kill -TERM `cat /var/run/udhcpc.%iface%.pid` 2>/dev/null",
ifd, exec)) return 1;
/* 2006-09-30: The following are deprecated, and should eventually be
* removed. For non-busybox (i.e., other than udhcpc) clients, use
* 'iface foo inet manual' in /etc/network/interfaces, and supply
* start/stop commands explicitly via up/down. */
if (execute("pump -i %iface% -k", ifd, exec)) return 1;
if (execute("kill -9 `cat /var/run/dhclient.%iface%.pid` 2>/dev/null",
ifd, exec)) return 1;
if (execute("dhcpcd -k %iface%", ifd, exec)) return 1;
#ifdef CONFIG_APP_UDHCPC
return execute("kill -TERM "
"`cat /var/run/udhcpc.%iface%.pid` 2>/dev/null", ifd, exec);
#else
int i, nclients = sizeof(ext_dhcp_clients) / sizeof(ext_dhcp_clients[0]);
for (i = 0; i < nclients; i++) {
if (exists_execable(ext_dhcp_clients[i].name))
return execute(ext_dhcp_clients[i].stopcmd, ifd, exec);
}
bb_error_msg("no dhcp clients found, using static interface shutdown");
return static_down(ifd, exec);
#endif
}
static int manual_up_down(struct interface_defn_t *ifd, execfn *exec)