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tools/hv: Parse /etc/os-release

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There is a new convention, used by systemd and supported by most
distributions, to put basic OS release information in /etc/os-release.
Added some additional error checking on strdup()

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ben Hutchings 2012-09-06 13:32:14 -07:00 committed by Greg Kroah-Hartman
parent 436473bc21
commit 44c8b25fb3
1 changed files with 55 additions and 4 deletions
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59
tools/hv/hv_kvp_daemon.c
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@ -454,6 +454,7 @@ void kvp_get_os_info(void)
uname(&uts_buf); uname(&uts_buf);
os_build = uts_buf.release; os_build = uts_buf.release;
os_name = uts_buf.sysname;
processor_arch = uts_buf.machine; processor_arch = uts_buf.machine;
/* /*
@ -465,20 +466,70 @@ void kvp_get_os_info(void)
if (p) if (p)
*p = '\0'; *p = '\0';
/*
* Parse the /etc/os-release file if present:
* http://www.freedesktop.org/software/systemd/man/os-release.html
*/
file = fopen("/etc/os-release", "r");
if (file != NULL) {
while (fgets(buf, sizeof(buf), file)) {
char *value, *q;
/* Ignore comments */
if (buf[0] == '#')
continue;
/* Split into name=value */
p = strchr(buf, '=');
if (!p)
continue;
*p++ = 0;
/* Remove quotes and newline; un-escape */
value = p;
q = p;
while (*p) {
if (*p == '\\') {
++p;
if (!*p)
break;
*q++ = *p++;
} else if (*p == '\'' || *p == '"' ||
*p == '\n') {
++p;
} else {
*q++ = *p++;
}
}
*q = 0;
if (!strcmp(buf, "NAME")) {
p = strdup(value);
if (!p)
break;
os_name = p;
} else if (!strcmp(buf, "VERSION_ID")) {
p = strdup(value);
if (!p)
break;
os_major = p;
}
}
fclose(file);
return;
}
/* Fallback for older RH/SUSE releases */
file = fopen("/etc/SuSE-release", "r"); file = fopen("/etc/SuSE-release", "r");
if (file != NULL) if (file != NULL)
goto kvp_osinfo_found; goto kvp_osinfo_found;
file = fopen("/etc/redhat-release", "r"); file = fopen("/etc/redhat-release", "r");
if (file != NULL) if (file != NULL)
goto kvp_osinfo_found; goto kvp_osinfo_found;
/*
* Add code for other supported platforms.
*/
/* /*
* We don't have information about the os. * We don't have information about the os.
*/ */
os_name = uts_buf.sysname;
return; return;
kvp_osinfo_found: kvp_osinfo_found: