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Merge pull request #7499 from taosdata/fix/TD-6164 

[TD-6164]<fix>: fix deadlock with fopen's malloc
This commit is contained in:
Shengliang Guan 2021-08-21 10:00:50 +08:00 committed by GitHub
parent c3d19d52c9 8d5c67ee5d
commit ad39459b59
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 14 additions and 8 deletions
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22
src/os/src/linux/linuxEnv.c
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@ -44,14 +44,20 @@ char cmdline[1024];
char* taosGetCmdlineByPID(int pid) {
sprintf(cmdline, "/proc/%d/cmdline", pid);
FILE* f = fopen(cmdline, "r");
if (f) {
size_t size;
size = fread(cmdline, sizeof(char), 1024, f);
if (size > 0) {
if ('\n' == cmdline[size - 1]) cmdline[size - 1] = '\0';
}
fclose(f);
int fd = open(cmdline, O_RDONLY);
if (fd >= 0) {
int n = read(fd, cmdline, sizeof(cmdline) - 1);
if (n < 0) n = 0;
if (n > 0 && cmdline[n - 1] == '\n') --n;
cmdline[n] = 0;
close(fd);
} else {
cmdline[0] = 0;
}
return cmdline;
}