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top: Add unobtrusive XDG support

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By default the file HOME/.toprc will be prefered.  This ensures there
should be minimal breakage even if this file is later created by some
other means.  Otherwise we will follow the new behaviour described by
the XDG Base Directory Specification:

If the XDG_CONFIG_HOME environment variable is available we will attempt
to use this as XDG_CONFIG_HOME/procps/toprc otherwise we will fall-back
to HOME/.config/procps/toprc instead.

Signed-off-by: Earnestly <zibeon@gmail.com>
This commit is contained in:
Earnestly
2017-01-11 19:18:39 +00:00
parent 75bb2dbccd
commit af53e170b9
2 changed files with 32 additions and 8 deletions
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25
top/top.c
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@@ -43,6 +43,7 @@
#include <sys/ioctl.h>
#include <sys/resource.h>
#include <sys/select.h> // also available via <sys/types.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h> // also available via <stdlib.h>
@@ -3458,13 +3459,10 @@ static int config_cvt (WIN_t *q) {
static void configs_read (void) {
float tmp_delay = DEF_DELAY;
char fbuf[LRGBUFSIZ];
const char *p;
const char *p, *p_home;
FILE *fp;
int i;
p = getenv("HOME");
snprintf(Rc_name, sizeof(Rc_name), "%s/.%src", (p && *p) ? p : ".", Myname);
fp = fopen(SYS_RCFILESPEC, "r");
if (fp) {
if (fgets(fbuf, sizeof(fbuf), fp)) { // sys rc file, line 1
@@ -3475,6 +3473,25 @@ static void configs_read (void) {
fclose(fp);
}
// attempt to use the legacy file first, if we cannot access that file, use
// the new XDG basedir locations (XDG_CONFIG_HOME or HOME/.config) instead.
p_home = getenv("HOME");
if (!p_home || p_home[0] == '\0')
p_home = ".";
snprintf(Rc_name, sizeof(Rc_name), "%s/.%src", p_home, Myname);
if (access(Rc_name, F_OK)) {
p = getenv("XDG_CONFIG_HOME");
// ensure the path we get is absolute, fallback otherwise.
if (!p || p[0] != '/') {
p = fmtmk("%s/.config", p_home);
(void)mkdir(p, 0700);
}
snprintf(Rc_name, sizeof(Rc_name), "%s/procps", p);
(void)mkdir(Rc_name, 0700);
snprintf(Rc_name, sizeof(Rc_name), "%s/procps/%src", p, Myname);
}
fp = fopen(Rc_name, "r");
if (fp) {
int tmp_whole, tmp_fract;