diff options
author | Lennart Poettering <lennart@poettering.net> | 2004-09-23 22:42:49 +0000 |
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committer | Lennart Poettering <lennart@poettering.net> | 2004-09-23 22:42:49 +0000 |
commit | ed36241085da8f797adf7d70ab702fee10e8cba0 (patch) | |
tree | 9380bc0993a72ba998e51d62b6e08033cb462fc2 /polyp/util.c | |
parent | 8176b3a1ba5020e0639f648a7f41f79f54cbcac2 (diff) |
allow high priority scheduling only for users in group "realtime"
git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@238 fefdeb5f-60dc-0310-8127-8f9354f1896f
Diffstat (limited to 'polyp/util.c')
-rw-r--r-- | polyp/util.c | 64 |
1 files changed, 60 insertions, 4 deletions
diff --git a/polyp/util.c b/polyp/util.c index 7148654a..1246bbb5 100644 --- a/polyp/util.c +++ b/polyp/util.c @@ -41,11 +41,8 @@ #include <sched.h> #include <sys/resource.h> #include <limits.h> -#include <sys/stat.h> -#include <sys/types.h> -#include <sys/stat.h> #include <unistd.h> - +#include <grp.h> #include <samplerate.h> @@ -444,3 +441,62 @@ int pa_parse_resample_method(const char *string) { else return -1; } + +static int is_group(gid_t gid, const char *name) { + struct group group, *result = NULL; + long n = sysconf(_SC_GETGR_R_SIZE_MAX); + void *data; + int r = -1; + + assert(n > 0); + data = pa_xmalloc(n); + + if (getgrgid_r(gid, &group, data, n, &result) < 0 || !result) { + pa_log(__FILE__ ": getgrgid_r(%u) failed: %s\n", gid, strerror(errno)); + goto finish; + } + + + r = strcmp(name, result->gr_name) == 0; + +finish: + pa_xfree(data); + + return r; +} + +int pa_uid_in_group(const char *name, gid_t *gid) { + gid_t *gids, tgid; + long n = sysconf(_SC_NGROUPS_MAX); + int r = -1, i; + + assert(n > 0); + + gids = pa_xmalloc(sizeof(gid_t)*n); + + if ((n = getgroups(n, gids)) < 0) { + pa_log(__FILE__": getgroups() failed: %s\n", strerror(errno)); + goto finish; + } + + for (i = 0; i < n; i++) { + if (is_group(gids[i], name) > 0) { + *gid = gids[i]; + r = 1; + goto finish; + } + } + + if (is_group(tgid = getgid(), name) > 0) { + *gid = tgid; + r = 1; + goto finish; + } + + r = 0; + +finish: + + pa_xfree(gids); + return r; +} |