mirror of
https://github.com/curl/curl.git
synced 2024-12-09 06:30:06 +08:00
102 lines
2.6 KiB
C
102 lines
2.6 KiB
C
/*****************************************************************************
|
|
* _ _ ____ _
|
|
* Project ___| | | | _ \| |
|
|
* / __| | | | |_) | |
|
|
* | (__| |_| | _ <| |___
|
|
* \___|\___/|_| \_\_____|
|
|
*
|
|
* $Id$
|
|
*
|
|
* Little tool to raise the amount of maximum file descriptor and then run the
|
|
* given command line (using the hard-coded uid/gid).
|
|
*
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <sys/time.h>
|
|
#include <sys/resource.h>
|
|
#include <unistd.h>
|
|
#include <errno.h>
|
|
#include <string.h> /* for errno translation */
|
|
|
|
/* ulimiter
|
|
*
|
|
* Source code inspiration from:
|
|
* http://www.cs.wisc.edu/condor/condorg/linux_scalability.html
|
|
*/
|
|
|
|
#define UID 1000 /* the user who must run this */
|
|
|
|
#define GID 1000 /* group id to run the program as */
|
|
|
|
/* Number of open files to increase to */
|
|
#define NEW_MAX 10000
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
int ret;
|
|
struct rlimit rl;
|
|
char *brgv[20];
|
|
int brgc=argc-1;
|
|
int i;
|
|
|
|
for(i=1; i< argc; i++)
|
|
brgv[i-1]=argv[i];
|
|
brgv[i-1]=NULL; /* terminate the list */
|
|
|
|
if(getuid() != UID) {
|
|
fprintf(stderr, "Only uid %d is allowed to run this\n", UID);
|
|
return 1;
|
|
}
|
|
|
|
ret = getrlimit(RLIMIT_NOFILE, &rl);
|
|
if(ret != 0) {
|
|
fprintf(stderr, "Unable to read open file limit.\n"
|
|
"(getrlimit(RLIMIT_NOFILE, &rl) failed)\n"
|
|
"(%d, %s)", errno, strerror(errno));
|
|
return 1;
|
|
}
|
|
|
|
fprintf(stderr, "Limit was %d (max %d), setting to %d\n",
|
|
rl.rlim_cur, rl.rlim_max, NEW_MAX);
|
|
|
|
rl.rlim_cur = rl.rlim_max = NEW_MAX;
|
|
ret = setrlimit(RLIMIT_NOFILE, &rl);
|
|
if(ret != 0) {
|
|
fprintf(stderr, "Unable to set open file limit.\n"
|
|
"(setrlimit(RLIMIT_NOFILE, &rl) failed)\n"
|
|
"(%d, %s)", errno, strerror(errno));
|
|
return 1;
|
|
}
|
|
|
|
ret = getrlimit(RLIMIT_NOFILE, &rl);
|
|
if(ret != 0) {
|
|
fprintf(stderr, "Unable to read new open file limit.\n"
|
|
"(getrlimit(RLIMIT_NOFILE, &rl) failed)\n"
|
|
"(%d, %s)", errno, strerror(errno));
|
|
return 1;
|
|
}
|
|
if(rl.rlim_cur < NEW_MAX) {
|
|
fprintf(stderr, "Failed to set new open file limit.\n"
|
|
"Limit is %d, expected %d\n",
|
|
rl.rlim_cur, NEW_MAX);
|
|
return 1;
|
|
}
|
|
|
|
if(setgid(GID) != 0) {
|
|
fprintf(stderr, "setgid failed (%d, %s)\n", errno, strerror(errno));
|
|
return 1;
|
|
}
|
|
if(setuid(UID) != 0) {
|
|
fprintf(stderr, "setuid failed (%d, %s)\n", errno, strerror(errno));
|
|
return 1;
|
|
}
|
|
|
|
ret = execv(brgv[0], brgv);
|
|
|
|
fprintf(stderr, "execl returned, failure\n"
|
|
"returned %d, errno is %d (%s)\n",
|
|
ret, errno, strerror(errno));
|
|
return 1;
|
|
}
|