lib/procutils: add proc_is_procfs helper.
Also add missing include in procutils.h for the definition of pid_t.
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@ -2,6 +2,7 @@
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#define UTIL_LINUX_PROCUTILS
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#include <dirent.h>
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#include <sys/types.h>
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struct proc_tasks {
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DIR *dir;
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@ -31,4 +32,6 @@ extern int proc_next_pid(struct proc_processes *ps, pid_t *pid);
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extern char *proc_get_command(pid_t pid);
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extern char *proc_get_command_name(pid_t pid);
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extern int proc_is_procfs(int fd);
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#endif /* UTIL_LINUX_PROCUTILS */
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@ -13,11 +13,13 @@
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#include <string.h>
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#include <errno.h>
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#include <sys/stat.h>
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#include <sys/vfs.h>
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#include <sys/types.h>
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#include <dirent.h>
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#include <ctype.h>
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#include "procutils.h"
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#include "statfs_magic.h"
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#include "fileutils.h"
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#include "all-io.h"
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#include "c.h"
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@ -235,6 +237,23 @@ int proc_next_pid(struct proc_processes *ps, pid_t *pid)
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return 0;
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}
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/* checks if fd is file in a procfs;
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* returns 1 if true, 0 if false or couldn't determine */
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int proc_is_procfs(int fd)
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{
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struct statfs st;
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int ret;
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do {
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ret = fstatfs(fd, &st);
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} while (ret == -1 && errno == EINTR);
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if (ret == 0)
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return st.f_type == STATFS_PROC_MAGIC;
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else
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return 0;
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}
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#ifdef TEST_PROGRAM_PROCUTILS
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static int test_tasks(int argc, char *argv[])
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