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authorGravatar Denis Vlasenko <vda.linux@googlemail.com>2007-10-29 19:22:13 +0000
committerGravatar Denis Vlasenko <vda.linux@googlemail.com>2007-10-29 19:22:13 +0000
commit5a28a25b9dd81e0975532458723c4244ff532e58 (patch)
tree53d30dbcfb05156500451389d47827487564b257 /procps
parent63430ae35ad98d5946851e8a366379dd1574f2a2 (diff)
downloadbusybox-5a28a25b9dd81e0975532458723c4244ff532e58.tar.gz
busybox-5a28a25b9dd81e0975532458723c4244ff532e58.tar.bz2
syscall: code shrink
text data bss dec hex filename 777209 974 9676 787859 c0593 busybox_old 777042 974 9676 787692 c04ec busybox_unstripped
Diffstat (limited to 'procps')
-rw-r--r--procps/sysctl.c185
1 files changed, 86 insertions, 99 deletions
diff --git a/procps/sysctl.c b/procps/sysctl.c
index a84f9aef9..a12948017 100644
--- a/procps/sysctl.c
+++ b/procps/sysctl.c
@@ -27,28 +27,29 @@ static int sysctl_display_all(const char *path, int output, int show_table);
/*
* Globals...
*/
-static const char PROC_PATH[] ALIGN1 = "/proc/sys/";
-static const char DEFAULT_PRELOAD[] ALIGN1 = "/etc/sysctl.conf";
+static const char ETC_SYSCTL_CONF[] ALIGN1 = "/etc/sysctl.conf";
+static const char PROC_SYS[] ALIGN1 = "/proc/sys/";
+enum { strlen_PROC_SYS = sizeof(PROC_SYS) - 1 };
/* error messages */
static const char ERR_UNKNOWN_PARAMETER[] ALIGN1 =
- "error: Unknown parameter '%s'\n";
+ "error: unknown parameter '%s'";
static const char ERR_MALFORMED_SETTING[] ALIGN1 =
- "error: Malformed setting '%s'\n";
+ "error: malformed setting '%s'";
static const char ERR_NO_EQUALS[] ALIGN1 =
- "error: '%s' must be of the form name=value\n";
+ "error: '%s' must be of the form name=value";
static const char ERR_INVALID_KEY[] ALIGN1 =
- "error: '%s' is an unknown key\n";
+ "error: '%s' is an unknown key";
static const char ERR_UNKNOWN_WRITING[] ALIGN1 =
- "error: unknown error %d setting key '%s'\n";
+ "error setting key '%s'";
static const char ERR_UNKNOWN_READING[] ALIGN1 =
- "error: unknown error %d reading key '%s'\n";
+ "error reading key '%s'";
static const char ERR_PERMISSION_DENIED[] ALIGN1 =
- "error: permission denied on key '%s'\n";
+ "error: permission denied on key '%s'";
static const char ERR_PRELOAD_FILE[] ALIGN1 =
- "error: cannot open preload file '%s'\n";
+ "error: cannot open preload file '%s'";
static const char WARN_BAD_LINE[] ALIGN1 =
- "warning: %s(%d): invalid syntax, continuing...\n";
+ "warning: %s(%d): invalid syntax, continuing";
static void dwrite_str(int fd, const char *buf)
@@ -72,7 +73,7 @@ int sysctl_main(int argc, char **argv)
argv++;
- for (; argv && *argv && **argv; argv++) {
+ for (; *argv /*&& **argv*/; argv++) {
if (switches_allowed && **argv == '-') { /* we have a switch */
switch ((*argv)[1]) {
case 'n':
@@ -84,120 +85,117 @@ int sysctl_main(int argc, char **argv)
break;
case 'p':
argv++;
- return
- sysctl_preload_file(((argv && *argv
- && **argv) ? *argv :
- DEFAULT_PRELOAD), output);
+ return sysctl_preload_file(((*argv /*&& **argv*/) ? *argv : ETC_SYSCTL_CONF),
+ output);
case 'a':
case 'A':
- switches_allowed = 0;
- return sysctl_display_all(PROC_PATH, output,
- ((*argv)[1] == 'a') ? 0 : 1);
- case 'h':
- case '?':
- bb_show_usage();
+ return sysctl_display_all(PROC_SYS, output,
+ ((*argv)[1] == 'A'));
default:
bb_error_msg(ERR_UNKNOWN_PARAMETER, *argv);
+ /* fall through */
+ //case 'h':
+ //case '?':
bb_show_usage();
}
} else {
switches_allowed = 0;
if (write_mode)
- retval = sysctl_write_setting(*argv, output);
+ retval |= sysctl_write_setting(*argv, output);
else
sysctl_read_setting(*argv, output);
}
}
return retval;
-} /* end sysctl_main() */
-
-
+} /* end sysctl_main() */
/*
- * sysctl_preload_file
- * preload the sysctl's from a conf file
- * - we parse the file and then reform it (strip out whitespace)
+ * sysctl_preload_file
+ * preload the sysctl's from a conf file
+ * - we parse the file and then reform it (strip out whitespace)
*/
#define PRELOAD_BUF 256
-int sysctl_preload_file(const char *filename, int output)
+static int sysctl_preload_file(const char *filename, int output)
{
- int lineno = 0;
+ int lineno;
char oneline[PRELOAD_BUF];
char buffer[PRELOAD_BUF];
- char *name, *value, *ptr;
- FILE *fp = NULL;
+ char *name, *value;
+ FILE *fp;
- if (!filename || ((fp = fopen(filename, "r")) == NULL)) {
+ fp = fopen(filename, "r");
+ if (fp == NULL) {
bb_error_msg_and_die(ERR_PRELOAD_FILE, filename);
}
+ lineno = 0;
while (fgets(oneline, sizeof(oneline) - 1, fp)) {
- oneline[sizeof(oneline) - 1] = '\0';
lineno++;
trim(oneline);
- ptr = (char *) oneline;
-
- if (*ptr == '#' || *ptr == ';')
+ if (oneline[0] == '#' || oneline[0] == ';')
continue;
-
- if (strlen(ptr) < 2)
+ if (!oneline[0] || !oneline[1])
continue;
- name = strtok(ptr, "=");
- if (!name || !*name) {
+ name = strtok(oneline, "=");
+ if (!name) {
bb_error_msg(WARN_BAD_LINE, filename, lineno);
continue;
}
-
trim(name);
+ if (!*name) {
+ bb_error_msg(WARN_BAD_LINE, filename, lineno);
+ continue;
+ }
value = strtok(NULL, "\n\r");
- if (!value || !*value) {
+ if (!value) {
bb_error_msg(WARN_BAD_LINE, filename, lineno);
continue;
}
-
- while ((*value == ' ' || *value == '\t') && *value != 0)
+ while (*value == ' ' || *value == '\t')
value++;
+ if (!*value) {
+ bb_error_msg(WARN_BAD_LINE, filename, lineno);
+ continue;
+ }
+
/* safe because sizeof(oneline) == sizeof(buffer) */
sprintf(buffer, "%s=%s", name, value);
sysctl_write_setting(buffer, output);
}
fclose(fp);
return 0;
-} /* end sysctl_preload_file() */
-
+} /* end sysctl_preload_file() */
/*
* Write a single sysctl setting
*/
-int sysctl_write_setting(const char *setting, int output)
+static int sysctl_write_setting(const char *setting, int output)
{
int retval = 0;
- const char *name = setting;
+ const char *name;
const char *value;
const char *equals;
char *tmpname, *outname, *cptr;
int fd = -1;
- if (!name) /* probably dont' want to display this err */
- return 0;
-
- if (!(equals = strchr(setting, '='))) {
+ name = setting;
+ equals = strchr(setting, '=');
+ if (!equals) {
bb_error_msg(ERR_NO_EQUALS, setting);
return -1;
}
- value = equals + sizeof(char); /* point to the value in name=value */
-
- if (!*name || !*value || name == equals) {
+ value = equals + 1; /* point to the value in name=value */
+ if (name == equals || !*value) {
bb_error_msg(ERR_MALFORMED_SETTING, setting);
return -2;
}
- tmpname = xasprintf("%s%.*s", PROC_PATH, (int)(equals - name), name);
- outname = xstrdup(tmpname + strlen(PROC_PATH));
+ tmpname = xasprintf("%s%.*s", PROC_SYS, (int)(equals - name), name);
+ outname = xstrdup(tmpname + strlen_PROC_SYS);
while ((cptr = strchr(tmpname, '.')) != NULL)
*cptr = '/';
@@ -215,7 +213,7 @@ int sysctl_write_setting(const char *setting, int output)
bb_perror_msg(ERR_PERMISSION_DENIED, outname);
break;
default:
- bb_error_msg(ERR_UNKNOWN_WRITING, errno, outname);
+ bb_perror_msg(ERR_UNKNOWN_WRITING, outname);
break;
}
retval = -1;
@@ -230,37 +228,36 @@ int sysctl_write_setting(const char *setting, int output)
dwrite_str(STDOUT_FILENO, "\n");
}
- /* cleanup */
free(tmpname);
free(outname);
return retval;
-} /* end sysctl_write_setting() */
-
+} /* end sysctl_write_setting() */
/*
* Read a sysctl setting
- *
*/
-int sysctl_read_setting(const char *setting, int output)
+static int sysctl_read_setting(const char *setting, int output)
{
int retval = 0;
char *tmpname, *outname, *cptr;
char inbuf[1025];
- const char *name = setting;
+ const char *name;
FILE *fp;
- if (!setting || !*setting)
+ if (!*setting)
bb_error_msg(ERR_INVALID_KEY, setting);
- tmpname = concat_path_file(PROC_PATH, name);
- outname = xstrdup(tmpname + strlen(PROC_PATH));
+ name = setting;
+ tmpname = concat_path_file(PROC_SYS, name);
+ outname = xstrdup(tmpname + strlen_PROC_SYS);
while ((cptr = strchr(tmpname, '.')) != NULL)
*cptr = '/';
while ((cptr = strchr(outname, '/')) != NULL)
*cptr = '.';
- if ((fp = fopen(tmpname, "r")) == NULL) {
+ fp = fopen(tmpname, "r");
+ if (fp == NULL) {
switch (errno) {
case ENOENT:
bb_error_msg(ERR_INVALID_KEY, outname);
@@ -269,7 +266,7 @@ int sysctl_read_setting(const char *setting, int output)
bb_error_msg(ERR_PERMISSION_DENIED, outname);
break;
default:
- bb_error_msg(ERR_UNKNOWN_READING, errno, outname);
+ bb_perror_msg(ERR_UNKNOWN_READING, outname);
break;
}
retval = -1;
@@ -287,18 +284,14 @@ int sysctl_read_setting(const char *setting, int output)
free(tmpname);
free(outname);
return retval;
-} /* end sysctl_read_setting() */
-
-
+} /* end sysctl_read_setting() */
/*
* Display all the sysctl settings
- *
*/
-int sysctl_display_all(const char *path, int output, int show_table)
+static int sysctl_display_all(const char *path, int output, int show_table)
{
int retval = 0;
- int retval2;
DIR *dp;
struct dirent *de;
char *tmpdir;
@@ -306,28 +299,22 @@ int sysctl_display_all(const char *path, int output, int show_table)
dp = opendir(path);
if (!dp) {
- retval = -1;
- } else {
- while ((de = readdir(dp)) != NULL) {
- tmpdir = concat_subpath_file(path, de->d_name);
- if (tmpdir == NULL)
- continue;
- retval2 = stat(tmpdir, &ts);
- if (retval2 != 0)
- bb_perror_msg(tmpdir);
- else {
- if (S_ISDIR(ts.st_mode)) {
- sysctl_display_all(tmpdir, output, show_table);
- } else
- retval |=
- sysctl_read_setting(tmpdir + strlen(PROC_PATH),
- output);
-
- }
- free(tmpdir);
- } /* end while */
- closedir(dp);
+ return -1;
}
+ while ((de = readdir(dp)) != NULL) {
+ tmpdir = concat_subpath_file(path, de->d_name);
+ if (tmpdir == NULL)
+ continue;
+ if (stat(tmpdir, &ts) != 0) {
+ bb_perror_msg(tmpdir);
+ } else if (S_ISDIR(ts.st_mode)) {
+ sysctl_display_all(tmpdir, output, show_table);
+ } else {
+ retval |= sysctl_read_setting(tmpdir + strlen_PROC_SYS, output);
+ }
+ free(tmpdir);
+ } /* end while */
+ closedir(dp);
return retval;
-} /* end sysctl_display_all() */
+} /* end sysctl_display_all() */