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| author | MadCamel <madcamel@gmail.com> | 2009-08-21 13:35:28 -0400 |
|---|---|---|
| committer | MadCamel <madcamel@gmail.com> | 2009-08-21 13:35:28 -0400 |
| commit | 44a76629cb297e949a8f8290e999504daffbda9e (patch) | |
| tree | f3e795a060d5e1a06f30d09e8a174fddd03e5ead /src/common/lock.c | |
| parent | b51bc31600679344486d8e8cfe9d525e58bfc0bb (diff) | |
| download | tmwa-44a76629cb297e949a8f8290e999504daffbda9e.tar.gz tmwa-44a76629cb297e949a8f8290e999504daffbda9e.tar.bz2 tmwa-44a76629cb297e949a8f8290e999504daffbda9e.tar.xz tmwa-44a76629cb297e949a8f8290e999504daffbda9e.zip | |
Made temporary files more robust against race conditions
Diffstat (limited to 'src/common/lock.c')
| -rw-r--r-- | src/common/lock.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/src/common/lock.c b/src/common/lock.c index 67001f9..c584017 100644 --- a/src/common/lock.c +++ b/src/common/lock.c @@ -1,4 +1,5 @@ +#include <unistd.h> #include <stdio.h> #include "lock.h" #include "socket.h" @@ -10,12 +11,12 @@ FILE* lock_fopen(const char* filename,int *info) { char newfile[512]; FILE *fp; - int no = 0; + int no = getpid(); // 安全なファイル名を得る（手抜き） do { sprintf(newfile,"%s_%04d.tmp",filename,++no); - } while((fp = fopen_(newfile,"r")) && (fclose_(fp), no<9999) ); + } while((fp = fopen_(newfile,"r")) && (fclose_(fp), no<99999) ); *info = no; return fopen_(newfile,"w"); } |