diff options
Diffstat (limited to 'archival/tar.c')
| -rw-r--r-- | archival/tar.c | 62 |
1 files changed, 31 insertions, 31 deletions
diff --git a/archival/tar.c b/archival/tar.c index bafb703..3792202 100644 --- a/archival/tar.c +++ b/archival/tar.c @@ -138,24 +138,20 @@ enum TarFileType { typedef enum TarFileType TarFileType; /* Might be faster (and bigger) if the dev/ino were stored in numeric order;) */ -static inline void addHardLinkInfo(HardLinkInfo ** hlInfoHeadPtr, dev_t dev, - ino_t ino, short linkCount, - const char *name) +static inline void addHardLinkInfo(HardLinkInfo ** hlInfoHeadPtr, + struct stat *statbuf, + const char *name) { /* Note: hlInfoHeadPtr can never be NULL! */ HardLinkInfo *hlInfo; - hlInfo = - (HardLinkInfo *) xmalloc(sizeof(HardLinkInfo) + strlen(name) + 1); - if (hlInfo) { - hlInfo->next = *hlInfoHeadPtr; - *hlInfoHeadPtr = hlInfo; - hlInfo->dev = dev; - hlInfo->ino = ino; - hlInfo->linkCount = linkCount; - strcpy(hlInfo->name, name); - } - return; + hlInfo = (HardLinkInfo *) xmalloc(sizeof(HardLinkInfo) + strlen(name)); + hlInfo->next = *hlInfoHeadPtr; + *hlInfoHeadPtr = hlInfo; + hlInfo->dev = statbuf->st_dev; + hlInfo->ino = statbuf->st_ino; + hlInfo->linkCount = statbuf->st_nlink; + strcpy(hlInfo->name, name); } static void freeHardLinkInfo(HardLinkInfo ** hlInfoHeadPtr) @@ -176,11 +172,10 @@ static void freeHardLinkInfo(HardLinkInfo ** hlInfoHeadPtr) } /* Might be faster (and bigger) if the dev/ino were stored in numeric order;) */ -static inline HardLinkInfo *findHardLinkInfo(HardLinkInfo * hlInfo, dev_t dev, - ino_t ino) +static inline HardLinkInfo *findHardLinkInfo(HardLinkInfo * hlInfo, struct stat *statbuf) { while (hlInfo) { - if ((ino == hlInfo->ino) && (dev == hlInfo->dev)) + if ((statbuf->st_ino == hlInfo->ino) && (statbuf->st_dev == hlInfo->dev)) break; hlInfo = hlInfo->next; } @@ -366,11 +361,9 @@ static int writeFileToTarball(const char *fileName, struct stat *statbuf, */ tbInfo->hlInfo = NULL; if (statbuf->st_nlink > 1) { - tbInfo->hlInfo = findHardLinkInfo(tbInfo->hlInfoHead, statbuf->st_dev, - statbuf->st_ino); + tbInfo->hlInfo = findHardLinkInfo(tbInfo->hlInfoHead, statbuf); if (tbInfo->hlInfo == NULL) - addHardLinkInfo(&tbInfo->hlInfoHead, statbuf->st_dev, - statbuf->st_ino, statbuf->st_nlink, fileName); + addHardLinkInfo(&tbInfo->hlInfoHead, statbuf, fileName); } /* It is against the rules to archive a socket */ @@ -460,6 +453,7 @@ static inline int writeTarFile(const char *tarName, const int verboseFlag, int gzipDataPipe[2] = { -1, -1 }; int gzipStatusPipe[2] = { -1, -1 }; pid_t gzipPid = 0; + volatile int vfork_exec_errno = 0; #endif int errorFlag = FALSE; @@ -495,13 +489,19 @@ static inline int writeTarFile(const char *tarName, const int verboseFlag, #ifdef CONFIG_FEATURE_TAR_GZIP if (gzip) { - if (socketpair(AF_UNIX, SOCK_STREAM, 0, gzipDataPipe) < 0 - || pipe(gzipStatusPipe) < 0) + if (pipe(gzipDataPipe) < 0 || pipe(gzipStatusPipe) < 0) { perror_msg_and_die("Failed to create gzip pipe"); + } signal(SIGPIPE, SIG_IGN); /* we only want EPIPE on errors */ - gzipPid = fork(); +# if __GNUC__ + /* Avoid vfork clobbering */ + (void) &include; + (void) &errorFlag; +# endif + + gzipPid = vfork(); if (gzipPid == 0) { dup2(gzipDataPipe[0], 0); @@ -514,10 +514,9 @@ static inline int writeTarFile(const char *tarName, const int verboseFlag, fcntl(gzipStatusPipe[1], F_SETFD, FD_CLOEXEC); /* close on exec shows sucess */ execl("/bin/gzip", "gzip", "-f", 0); + vfork_exec_errno = errno; - write(gzipStatusPipe[1], "", 1); close(gzipStatusPipe[1]); - exit(-1); } else if (gzipPid > 0) { close(gzipDataPipe[0]); @@ -528,9 +527,10 @@ static inline int writeTarFile(const char *tarName, const int verboseFlag, int n = read(gzipStatusPipe[0], &buf, 1); - if (n == 1) - error_msg_and_die("Could not exec gzip process"); /* socket was not closed => error */ - else if ((n < 0) && (errno == EAGAIN || errno == EINTR)) + if (n == 0 && vfork_exec_errno != 0) { + errno = vfork_exec_errno; + perror_msg_and_die("Could not exec gzip process"); + } else if ((n < 0) && (errno == EAGAIN || errno == EINTR)) continue; /* try it again */ break; } @@ -538,7 +538,7 @@ static inline int writeTarFile(const char *tarName, const int verboseFlag, tbInfo.tarFd = gzipDataPipe[1]; } else { - perror_msg_and_die("Failed to fork gzip process"); + perror_msg_and_die("Failed to vfork gzip process"); } } #endif @@ -603,7 +603,7 @@ int tar_main(int argc, char **argv) archive_handle_t *tar_handle; int opt; char *base_dir = NULL; - char *tar_filename = "-"; + const char *tar_filename = "-"; #ifdef CONFIG_FEATURE_TAR_CREATE unsigned char tar_create = FALSE; |