mirror of
https://github.com/postgrespro/pg_probackup.git
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5c37daca69
All the ERROR_* fields are removed in favor of a more simple layer made of ERROR, FATAL, PANIC. The two last ones are not actually used yet, thought there should be some code paths that would need more polishing on this matter. The error message emitted before leaving should be fine to let the user know what is happening.
70 lines
1.7 KiB
C
70 lines
1.7 KiB
C
/*-------------------------------------------------------------------------
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*
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* fetch.c
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* Functions for fetching files from PostgreSQL data directory
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*
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* Portions Copyright (c) 1996-2016, PostgreSQL Global Development Group
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*
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*-------------------------------------------------------------------------
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*/
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#include "postgres_fe.h"
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#include "catalog/catalog.h"
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <dirent.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <string.h>
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#include "pg_arman.h"
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/*
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* Read a file into memory. The file to be read is <datadir>/<path>.
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* The file contents are returned in a malloc'd buffer, and *filesize
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* is set to the length of the file.
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*
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* The returned buffer is always zero-terminated; the size of the returned
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* buffer is actually *filesize + 1. That's handy when reading a text file.
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* This function can be used to read binary files as well, you can just
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* ignore the zero-terminator in that case.
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*
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*/
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char *
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slurpFile(const char *datadir, const char *path, size_t *filesize)
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{
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int fd;
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char *buffer;
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struct stat statbuf;
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char fullpath[MAXPGPATH];
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int len;
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snprintf(fullpath, sizeof(fullpath), "%s/%s", datadir, path);
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if ((fd = open(fullpath, O_RDONLY | PG_BINARY, 0)) == -1)
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elog(ERROR, "could not open file \"%s\" for reading: %s",
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fullpath, strerror(errno));
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if (fstat(fd, &statbuf) < 0)
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elog(ERROR, "could not open file \"%s\" for reading: %s",
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fullpath, strerror(errno));
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len = statbuf.st_size;
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buffer = pg_malloc(len + 1);
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if (read(fd, buffer, len) != len)
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elog(ERROR, "could not read file \"%s\": %s\n",
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fullpath, strerror(errno));
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close(fd);
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/* Zero-terminate the buffer. */
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buffer[len] = '\0';
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if (filesize)
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*filesize = len;
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return buffer;
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}
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