提交 31bbf66e 编写于 作者: W Wu Fengguang 提交者: Linus Torvalds

page-types: introduce checked_open()

This helps merge duplicate code (now and future) and outstand the main
logic.
Signed-off-by: NWu Fengguang <fengguang.wu@intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
上级 0c57effe
......@@ -214,6 +214,18 @@ static void fatal(const char *x, ...)
exit(EXIT_FAILURE);
}
int checked_open(const char *pathname, int flags)
{
int fd = open(pathname, flags);
if (fd < 0) {
perror(pathname);
exit(EXIT_FAILURE);
}
return fd;
}
/*
* page flag names
......@@ -534,11 +546,7 @@ static void walk_addr_ranges(void)
{
int i;
kpageflags_fd = open(PROC_KPAGEFLAGS, O_RDONLY);
if (kpageflags_fd < 0) {
perror(PROC_KPAGEFLAGS);
exit(EXIT_FAILURE);
}
kpageflags_fd = checked_open(PROC_KPAGEFLAGS, O_RDONLY);
if (!nr_addr_ranges)
add_addr_range(0, ULONG_MAX);
......@@ -631,11 +639,7 @@ static void parse_pid(const char *str)
opt_pid = parse_number(str);
sprintf(buf, "/proc/%d/pagemap", opt_pid);
pagemap_fd = open(buf, O_RDONLY);
if (pagemap_fd < 0) {
perror(buf);
exit(EXIT_FAILURE);
}
pagemap_fd = checked_open(buf, O_RDONLY);
sprintf(buf, "/proc/%d/maps", opt_pid);
file = fopen(buf, "r");
......
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